Submission v0.9

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Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

Submission v095

WIP.gif This page is meant to evolve to the approved normative standard. It is not for the addition of commentary during or after the TDWG submission process. Comments on the proposal are invited at Discussable_v0.9 The page is closed except for technical editing by Jose Cuadra and Bob Morris in furtherance of TDWG submission. Nobody else should edit it.

Warning.pngIf you are unfamiliar with MRTG, please read the MRTG Non normative document before editing this page. It lays out why there is perceived a need for a biodiversity media resource metadata schema, and how we attempt to use existing metadata standards where possible. This page should be largely confined to discussion of what's missing, and what's good or bad about the specifications that are here. Critique of the architecture as a whole should be at MRTG Architecture


Terminology of this specification

There are many ways to organize metadata specifications, particularly as to the nomenclature of the constituents of the metadata. In this document and the associated non-normative documentation, we willfollow closely (sometimes verbatim) a portion of the Dublin Core Metadata Initiative (DCMI) metadata nomenclature as described in Section 2.3 of the DCMI Abstract Model (http://www.dublincore.org/documents/abstract-model/).

  • A term is a metadata item that forms part of the description of a multimedia resource.
  • A term has a type which is one of "Property" or "Class", We refer to a term of type Property as simply a Property, similarly for Class.
  • A value is a resource - the physical, digital or conceptual entity or literal that is associated with a property when a property-value pair is used to describe a resource. Therefore, each value is either a literal value or a non-literal value.
  • A literal value is a value which is a literal.
  • A non-literal value is a value which is a physical, digital or conceptual entity.
  • A literal is an entity which uses a Unicode string as a lexical form, together with an optional language tag or datatype, to denote a resource. In MRTG, the language tag appears as a value assigned to the metadata record.
  • A Property is a term that has a value. The datatypes of values are specified in this document. Typically the values are either a member of a fixed set of literals, a URI, a numerical type, free text, or the datatype and values from an external controlled vocabulary referenced in the standard.
  • A Class is a term that has a set of Properties. Thus, the values of the properties in this set define what it means for a resource (whether multimedia or not) to be a member of the class.. Typically if M is a resource and C is a class, we say "M is a C". We attempt to minimize the number of classes, because we want to support simple serializations, notably text files such as "Comma Separated Values" (CSV), in which structured representation is cumbersome or impossible.
  • A Vocabulary is a set of terms.
  • Multimedia Resource is anything that a provider identifies as belonging to one of the possible values of the MRTG Type term and one of the Subtype term values. A mechanism is provided by which providers can supply a privately defined subtype that will not collide with the MRTG defined Subtype values.
  • A MRTG record is a set of terms with any property values conforming to this document, and which contain at least the six mandatory terms described below, and which describes a single multimedia resource (possibly including a Collection). One of these, the value of Identifier is a Globally Unique IDentifier (GUID), which may have been assigned to the resource by an external authority or by the provider of the metadata record.

Every MRTG term has a plain text Name, a URI and a plain text normative Definition. URI's for terms conform the the http URI scheme (See, http://en.wikipedia.org/wiki/URI_scheme, http://www.w3.org/TR/uri-clarification/, or http://www.ietf.org/rfc/rfc2396.txt ). Informally, one may understand this thusly: an http URI has the syntax of an http URL, but there is no expectation that putting it in a web browser will result in any information being returned to the browser, and if there is, it may have no relevance. This conformance requirement applies only to the URIs that identify MRTG terms. Any others, such as might arise if the values of MRTG propertiers are taken from another controlled vocabulary chosen by the user, as a few MRTG properties permit. In this case, those values may involve URIs conforming to a scheme given by that external vocabulary.

Because http URIs are rather lengthy, MRTG documents follow a standard practice of introducing a short abbreviation comprising a "namespace qualifier" and a mnemonic name closely related to the term's Name. The result is known in XML parlance as a qualified name. For example the documentation below for the Identifier term renders its URI as " dcterms:identifier" but hovering over it will reveal that its actual URI is http://dublincore.org/documents/dcmi-terms/#identifier. In fact, most of the URIs for terms borrowed from external vocabularies (about half of them) do in fact resolve to something in relevant documentation for that external standard. Sometimes it is not precise because the documentation is a PDF document and several (different!) URIs might apparently resolve to the same place. Keep in mind that any fortuitous resolution of an http URI is not related to its use as an identifier, no matter how informative that resolution may be. That said, MRTG solicits discussion on the wiki at points where contributors find our association of a MRTG term with that from another standard as misleading or otherwise inappropriate.

Management Vocabulary

Name:Identifier
Normative URI: dcterms:identifier [1]
  Layer: Core — Required: Yes for collections, No for media resource (but preferred if available) — Repeatable: Yes
Definition: An arbitrary code that is unique for the resource, with the resource being either a provider, collection, or media item.
Comments:Recommend to follow dwc best practices. Using multiple identifiers implies that they have a same-as relationship, i.e. they all identify the same object (e.g. an object may have an http-URL, and lsid-URI, and a GUID-number).
Name:Type
Normative URI: dcterms:type [1]
  Layer: Core — Required: Yes — Repeatable: No
Definition: Any dcmi type term from http://dublincore.org/documents/dcmi-type-vocabulary/ may be used. Recommended terms are Collection, StillImage, Sound, MovingImage, InteractiveResource, Text.
Comments:A Collection should be given type http://purl.org/dc/dcmitype/Collection. If the resource is a Collection, this item does not identify what types of objects it may contain. Following the DC recommendations at http://purl.org/dc/dcmitype/Text, images of text should be marked as Text.
Name:Subtype
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:subtype [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Any of Drawing, Painting, Logo, Icon, Illustration, Graphic, Photograph, Animation, Film, SlideShow, DesignPlan, Diagram, Map, MusicalNotation, IdentificationKey, ScannedText, RecordedText, RecordedOrganism, TaxonPage, MultimediaLearningObject, VirtualRealityEnvironment, GlossaryPage.

These values may either be used in their literal form, or with their full namespace, e.g. Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:identificationKey [2]
Comments:This does not apply to Collection objects. The vocabulary may be extended by users provided they identify the term by a URI which is not in the mrtg namespace (for example, using "http://my.inst.org/namespace/metadata/subtype/repair-manual". Conforming applications may choose to ignore these.
Name:Title
Normative URI: dcterms:title [1]
  Layer: Core — Required: Yes — Repeatable: No
Definition: Concise title, name, or label of institution, resource collection, or individual resource. This field should include the complete title with all the subtitles, if any.
Comments:The title facilitates interactions with humans: e.g. the title would be used as display text of hyperlinks or to provide a choice of images through pick list. The title is therefore highly desirable and an effort should be made to provide it where not already available. The taxon name(s) will form a good substitute title.
Name:Metadata Modified
Normative URI: xmp:MetadataDate[3]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Point in time recording when the last change to metadata (not necessarily the media object itself) occurred. The date and time must comply with the World Wide Web Consortium (W3C) datetime practice, which requires that date and time representation correspond to ISO 8601:1998, but with year fields always comprising 4 digits. This makes datetime records compliant with 8601:2004. AC datetime values may also follow 8601:2004 for ranges by separating two IS0 8601 datetime fields by a solidus ("forward slash", '/'). See also the wikipedia IS0 8601 entry for further explanation and examples.
Comments:Use case: a) for incremental harvesting: holder of metadata who also holds resource may be receiving metadata more frequently than underlying resources and can figure out whether updating the resource is necessary. This is not dcterms:modified, which is referring to the resource itself, but not its metadata.
Name:Metadata Language
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:metadataLanguage [2]
  Layer: Core — Required: Yes — Repeatable: No
Definition: Language of description and other metadata (but not necessarily of the image itself) represented in ISO639-1 or -3.
Comments:This is NOT dcterms:language [1], which is about the resource, not the metadata. This is deliberately single-valued, imposing a requirement that multi-lingual metadata be represented as separate, complete, metadata records in which also the language-neutral items appear. Consumers can re-combine records by identity of Resource IDs (which is highly recommended to supply).
Name:Provider Managed ID
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:providerManagedID [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: A free-form identifier (a simple number, an alphanumeric code, a URL, etc.) that is unique and meaningful primarily for the data provider.
Comments:Ideally, this would be a globally unique identifier (GUID), but the provider is encouraged to supply any form of identifier that simplifies communications on resources within the project and help to locate individual data items in the providers data repositories. It is the providers decision whether to expose this value or not.
Name:Rating
Normative URI: xmp:Rating[3]
  Layer: Core — Required: No — Repeatable: No
Definition: A rating from 1 (worst) to 5 (best), where the metadata provider is able to provide resource ratings.
Comments:The origin of the rating is left unknown, it may, e.g., be based on user feedback or on editorial ratings.
Name:Commenter
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:commenter [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: If present, then resource has comments. Provider is NOT asserting Commenter has expertise. Must display a name or the literal "anonymous" (= anonymously reviewed).
Comments:Provider is asserting they accept these comments, but makes no claim as to competency of the Commenter.
Name:Comments
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:comments [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Any comment provided on the subject featured in the media item.
Comments:There is a separate item for reviewer comments, which is defined more as an expert-level review.
Name:Reviewer
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:reviewer [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: If present, then resource is peer-reviewed. The notation of whether an expert in the subject featured in the media has reviewed the media item (or collection?) and approved its metadata description. Must display a name or the literal "anonymous" (= anonymously reviewed).
Comments:Provider is asserting they accept this review as competent.
Name:Reviewer Comments
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:reviewerComments [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Any comment provided by an expert in the subject featured in the media item.
Name:Modified
Normative URI: dcterms:modified [1]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Date that the media resource was altered. The date and time must comply with the World Wide Web Consortium (W3C) datetime practice, which requires that date and time representation correspond to ISO 8601:1998, but with year fields always comprising 4 digits. This makes datetime records compliant with 8601:2004. AC datetime values may also follow 8601:2004 for ranges by separating two IS0 8601 datetime fields by a solidus ("forward slash", '/'). See also the wikipedia IS0 8601 entry for further explanation and examples.
Comments:dcterms:modified [1] permits all modification dates or if one, only assumed latest.
Name:Date Available
Normative URI: dcterms:available [1]
  Layer: Extended — Required: No — Repeatable: No
Definition: The date (often a range) that the resource became or will become available. The date and time must comply with the World Wide Web Consortium (W3C) datetime practice, which requires that date and time representation correspond to ISO 8601:1998, but with year fields always comprising 4 digits. This makes datetime records compliant with 8601:2004. AC datetime values may also follow 8601:2004 for ranges by separating two IS0 8601 datetime fields by a solidus ("forward slash", '/'). See also the wikipedia IS0 8601 entry for further explanation and examples.
Name:Accrual Policy
Normative URI: dcterms:accrualPolicy [1]
  Layer: Extended — Required: No — Repeatable: No
Definition: A policy governing addition of items to a collection. Examples are planned deliverables and estimate for future changes.
Comments:Although an important management item, the relevance of this to consumers of metadata is limited to specific cases; e.g. where the Accrual Policy specifies that data are available only for a limited period.


Attribution Vocabulary

Name:
Normative URI: xmpRights:Owner[4]
  Layer: Core — Required: Yes — Repeatable: No
Definition: The name of the owner of the copyright. 'Unknown' is an acceptable value.
Comments:ALA uses dcterms:publisher [1] for this purpose, but it seems doubtful that the publisher is by necessity the copyright owner. Copyright owner cannot be repeated (only a single owner is possible).
Name:
Normative URI: dcterms:rights [1]
  Layer: Core — Required: Yes — Repeatable: No
Definition: Information about rights held in and over the resource. A full-text, readable copyright statement, as required by the national legislation of the copyright holder. On collections, this applies to all contained objects, unless the object itself has a different statement. Examples: “Copyright XY 2008, all rights reserved”, “© 2008 XY Museum” , "Public Domain." Do not place just the name of the copyright holder here!
Comments:This expressed rights over resource, not over the metadata text.
Name:License Statement
Normative URI: xmpRights:UsageTerms[4]
  Layer: Core — Required: No — Repeatable: No
Definition: The license statement defining how resources may be used. Information on a collection applies to all contained objects unless the object has a different statement.
Comments:Example: "Available under Creative Commons by-nc-sa 2.5 license".This also informs on the commercial availability of items. Buying an identification tool or media resource is essentially the purchase of an individual license. Examples for such License statements: “Available through bookstores” for a commercially published CD, in License; “Individual licenses available for purchase” for a high-resolution image (note that the medium or low resolution levels of the same image may be available under Creative Commons!)
Name:License URL
Normative URI: xmpRights:WebStatement[4]
  Layer: Core — Required: No — Repeatable: No
Definition: A URL defining or further elaborating on the license statement (e.g. a web page explaining the precise terms of use).
Comments:The value of this field may provide a complete definition of the terms of use. For Creative Commons, the appropriate value is the URL of the defining Web page for the license. Example: http://creativecommons.org/licenses/by-nc-sa/3.0/us/
Name:License Logo URL
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:licenseLogoURL [2]
  Layer: Core — Required: No — Repeatable: No
Definition: A URL providing access to a logo that symbolizes the License.
Comments:The legal responsibility for choosing a correct graphical representation must lie with the provider of metadata and can not be assumed by a service that offers are search or reporting user-interface. Example: 88x31.png
Name:Attribution Statement
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/CreditLine [5]
  Layer: Core — Required: No — Repeatable: No
Definition: free text for "please cite this as…"
Name:Attribution Logo URL
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:attributionLogoURL [2]
  Layer: Core — Required: No — Repeatable: No
Definition: The URL of icon or logo image to appear in source attribution.
Comments:Entering this URL into a browser should only result in the icon (not in a webpage including the icon).
Name:
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:attributionLinkURL [2]
  Layer: Core — Required: No — Repeatable: No
Definition: The URL where information about ownership, attribution, etc. of the resource may be found.
Comments:This URL may be used in creating a clickable logo. Providers should consider making this link as specific and useful to consumers as possible, e.g., linking to a metadata page of the specific image resource rather than to a generic page describing the owner or provider of a resource.
Name:Published Source
Normative URI: dcterms:source [1]
  Layer: Core — Required: No — Repeatable: Yes
Definition: An identifiable source from which the described resources was derived. It may be digital, but in any case should be a source for which the originator intended long-term availability.
Comments:If image, key, etc. was taken from (i.e. digitized) or was also published in a digital or printed publication. Do not put generally "related" publications in here. This field normally contains a free-form text description; it may be a URI: (“digitally-published://ISBN=961-90008-7-0”) if this resource is also described separately in the data exchange. Can be repeatedable if a montage of images.


Agents Vocabulary

Name:Creator
Normative URI: dcterms:creator [1]
  Layer: Core — Required: No — Repeatable: Yes
Definition: The person or organization responsible for creating the media resource
Comments:* The value may be simple text or a nested object representing the details of a CI_ResponsibleParty
  • Note that the Creator need not be the Copyright Owner
Name:Provider
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:provider [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Person or organization responsible for compiling and presenting the record.
Name:Metadata Provider
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:metadataProvider [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Person or organization responsible for compiling and presenting this MRTG metadata record.


Content Coverage Vocabulary

Name:Description
Normative URI: dcterms:description [1]
  Layer: Core — Required: No — Repeatable: No
Definition: Description of collection or individual resource, containing the Who, What, When, Where and Why as free-form text.
Comments:It optionally allows to present detailed information and will in most cases be shown together with the resource title. If both description and caption (see below) are present, a description is typically displayed instead of the resource. Should be a good proxy for the underlying media resource. Interpretation depends on type.
Name:Caption
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:caption [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: As alternative or in addition to description, a caption is free-form text to be displayed together with (rather than instead of) a resource that is suitable for captions (especially images).
Comments:Often only one of description or caption is present; choose the concept most appropriate for your metadata.
Name:Language
Normative URI: dcterms:language [1]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Language(s) of resource itself represented in ISO639-1 or -3
Comments:An image may contain language such as superimposed labels. If an image is of a natural scene or organism, without any language included, the resource is language-neutral (ISO code “zxx”). Resources with present but unknown language are to be coded as undetermined (ISO code “und”). Resources only containing scientific organism names should be coded as "zxx-x-taxon" (do not use the incorrect “la” for Latin). If there is no language code available, you must use the ISO extension mechanisms (x-XXX or XXXXXXX, CITE).


Geography Vocabulary

Introduction

Location created and Location shown are separated in the current version of IPTC, and the metadata working group (MWG 2008) also recommends this. We will follow this, to support the expected future increase of automatic GPS based coordinate recording in recording devices. As a special case, the MRTG group recommends to change the semantics of location shown in the case of biodiversity specimens, where the original location differs from the current location at which the specimen is collected. In this case, LocationShown should exclusively refer to the location where a specimen was originally collected (gathering or sampling location). Use LocationCreation to express the location where the media was created (a specimen was digitized).

Name:Location Shown
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/LocationShown [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: The location that is shown or the place of the media content, irrespective of the location from which the resource has been created.
Name:World Region
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/WorldRegion [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: World region classification, such as continent, waterbody, island group, or island names, preferred from a controlled vocabulary (to be defined).
Comments:We believe it is important to follow the XMP and IPTC standard set for media metadata and implemented in media management software. DarwinCore here forces primary metadata providers to classify world region terms into. This can, however, relatively easy be achieved by metadata aggregators (e.g. using biogeomancer-like services).
Name:Country Code
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/CountryCode [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: The geographic location of the specific entity(ies) documented by the media item, expressed through a constrained vocabulary of countries using 2-letter ISO country code (e. g. "it, si").
Comments:Accepted exceptions to be used instead of ISO codes are: "Global", "Marine", "Europe", “N-America”, “C-America”, “S-America”, "Africa", “Asia”, “Oceania”, ATA = "Antarctica", XEU = "European Union", XAR = "Arctic", "ZZZ" = "Unknown country" (3 letter abbreviations from IPTC codes). This list may be extended as necessary.
Name:Country Name
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/CountryName [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: This field can be free text, but where possible, the use of http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/CountryCode [5] is preferred.
Name:Province or State
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/ProvinceState [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Optionally, the geographic unit immediately below the country level (individual states in federal countries, provinces, or other administrative units) in which the subjects (e. g., species, habitats, or events) were recorded by the media (if such information is available in separate fields).
Name:County or Subprovince
Normative URI: dwc:county[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: The Counties, subprovinces, or sub-administrative units in which the subjects were recorded by the media.
Name:City or Place Name
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/City [5]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Optionally, the name of a city or place commonly found in gazetteers (such as a mountain or national park) in which the subject (e.g., species, habitats, or events) was recorded by the media.
Name:Sublocation
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/Sublocation [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Free-form text location details down to the village, forest, or geographic feature etc., especially information that could not be found in a gazetteer.
Comments:We distinguish Locality in the sense of dwc (= a complete description of a locality, with the possible except of country names etc. separted in the dwc:HigherGeography, and Sublocation in the sense of IPTC/XMP, i.e. the remainder free-form text location within a fully hierarchically arranged grouping (earlier IPTC versions used “Location”, but this has been renamed as of 2008).

Secondary free-form text geography

Name:Verbatim Higher Geography
Normative URI: dwc:higherGeography[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Optionally, as free-form text and a complement to Locality, any information from continent etc. down to country, i.e. everything that is less specific than the content of the Locality field.
Name:Locality
Normative URI: dwc:locality[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Actual geolocation of observation as free-form text. This may be either complete, or be all information except those present in Higher Geography.
Comments:This is place to put a free form text description.


Coordinates, elevation, etc.

Name:Geo-coordinates
Normative URI: dwc:verbatimCoordinates[6]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Latitude and longitude of geographic coordinates. Both decimal representation (use "." as decimal point) or degree-minute-second (use " for minutes and ' for seconds) may be used. End the latitude with N or S, or prefix the value with "+" for northward and "-" for southward. . End the longitude with the letters E or W, or prefix the value with "+" for eastward and "-" for westward. Use the comma (",") to separate latitude from longitude. If positive/negative values are being used instead of prefix letters, it is essential to place the latitude first; otherwise it is recommended. A geodetic datum (such as WGS84 used for GPS measurements) may optionally be added in parentheses at the end. Examples: "27°59'16?N, 86°56'40?E (WGS84)" or "+49.5000°,-123.5000°" (for decimal degrees and using positive/negative values).
Comments:This may be derived from the GPS of camera, not location shown. Where the provider has the data separated, recommended best practice is to the separately provided Latitude and Longitude metadata items; this item is in support of metadata where the coordinates are not separated and the provider is unable to provide reliable separation.
Name:Latitude
Normative URI: dwc:verbatimLatitude[6]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Latitude as separate value; compare Geo-coordinates for further information.
Name:decimalLatitude
Normative URI: dwc:decimalLatitude[6]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Latitude as separate value; Usage as defined at dwc:decimalLatitude[6].
Name:Longitude
Normative URI: dwc:verbatimLongitude[6]
  Layer: Core — Required: No — Repeatable: No
Definition: Longitude as separate value; compare Geo-coordinates for further information.
Name:decimalLongitude
Normative URI: dwc:decimalLongitude[6]
  Layer: Core — Required: No — Repeatable: No
Definition: Longitude as separate value; compare Geo-coordinates for further information.
Name:Coordinate Precision
Normative URI: dwc:coordinatePrecision[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: An estimate of how precisely the locality was recorded, expressed as a distance, in meters, that corresponds to a radius around the lat-long coordinates.
Name:Coordinate system
Normative URI: dwc:verbatimCoordinateSystem[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: The official name of the spatial coordinate system used for recording the coordinates (Latitude, Longitude or Geo-coordinates) of the place shown in the media.
Comments:Recommended best practice is to use a controlled vocabulary.
Name:Depth
Normative URI: dwc:verbatimDepth[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: The depth or range of depth at which the media was recorded. Quantitative expressions including measurement units are preferred.
Name:Elevation
Normative URI: dwc:verbatimElevation[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: The specific elevation or range of elevation at which the media was recorded, including units (elevation is defined as zero being mean sea level). This is the position of camera - any additional elevation of the subject itself should be put in description.


Temporal Coverage Vocabulary

Name:Temporal Coverage
Normative URI: ncd:temporalCoverage[7]
  Layer: Extended — Required: No — Repeatable: No
Definition: The extent or scope of the content of the resource. Coverage will typically include temporal period (a period label, date, or date range). If dates are mentioned, they should follow ISO 8601
Comments:Examples in English: "Jurassic", "Elizabethan", "Spring, 1957". 2008-01-01/2008-06-30
Name:Original Date and Time
Normative URI: xmp:CreateDate[3]
  Layer: Core — Required: No — Repeatable: No
Definition: The date of the creation for the original resource from which the digital object was derived or created. The date and time must comply with the World Wide Web Consortium (W3C) datetime practice, which requires that date and time representation correspond to ISO 8601:1998, but with year fields always comprising 4 digits. This makes datetime records compliant with 8601:2004. AC datetime values may also follow 8601:2004 for ranges by separating two IS0 8601 datetime fields by a solidus ("forward slash", '/'). See also the wikipedia IS0 8601 entry for further explanation and examples.
Comments:What is what constitutes "original" is determined by the metadata author. Example: Digitization of a photographic slide of a map would normally give the date at which the map was created; however an photographic work of art including the same map as its content, may give the data of the original photographic exposure. Imprecise or unknown dates can be represented as ISO dates or ranges. Compare also Date and Time Digitized.
  • Is this redundant? BobMorris 18:31, 1 February 2009 (CEST)
Name:Time of Day
Normative URI:

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mrtg:timeOfDay [2]
  Layer: Core — Required: No — Repeatable: No
Definition: Free text information beyond exact clock times.
Comments:Examples in English: afternoon, twilight.


Subject of Resource Vocabulary

Name:Physical Setting
Normative URI:

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mrtg:physicalSetting [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: The Setting of the content represented in a medium like images, sounds, movies. Constrained vocabulary of: "Natural" = Unmodified object in a natural setting of unmodified object (e. g. living organisms in their natural environment); "Artificial" = Unmodified object in artificial setting of (e. g. living organisms in artificial environment: Zoo, Garden, Greenhouse, Laboratory; photographic background or background sound suppression). "Irrelevant" (e.g. background of Museum shots).
Comments:Multiple values may be needed for movies.
Name:Subject Category
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/CVterm [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Controlled vocabulary of subjects that help provide search capabilities. Terms from various controlled vocabularies may be used. MRTG-recommended vocabularies are preferred and may be unqualified literals (without a URI). For terms from other vocabularies either a precise URI should be used, or, when providing unqualified terms, to provide the source vocabulary in Subject Category Vocabulary.
Comments:Recommended sets include: (PROVIDE REFS) Nasa GCMD, K2N BioComplexityThesaurus, GEMET, Can include major groups such as vertebrates, fungi; ecosystem terms?? apparatus terms?? such as…, aquatic vertebrates, forest fires. In the case where the unqualified terms from different vocabularies are homographs, the MRTG recommendation provides and order of preference for assigning terms to specific vocabularies. This includes other formal classifications (published in print or online) such as habitat, fuel, invasive species, agroproductivity, fisheries, migratory species etc
Name:Subject Category Vocabulary
Normative URI:

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mrtg:subjectCategoryVocabulary [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Any vocabulary or formal classification from which additional terms in Subject Category have been drawn.
Comments:The MRTG recommended vocabularies do not need to be cited here. There is no linkage between individual Subject Category terms and the vocabulary; the mechanism is intended to support discovery of the normative URI for a term, but not guarantee it.
Name:Tag
Normative URI:

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mrtg:tag [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: General keywords or tags.
Comments:Tags may be multi-worded phrases. Where scientific names, common names, geographic locations, etc. are separable, these should go into the more specific metadata items provided further below. Examples: "flower diagram". Character or part keywords like "leaf", "flower color" are especially desirable.


Taxonomic Coverage Vocabulary

Name:Taxonomic Coverage
Normative URI: ncd:taxonCoverage[7]
  Layer: Core — Required: No — Repeatable: No
Definition: A higher taxon (e.g. a genus, family, or order) at the level of the family or higher, that covers all taxa that are subject of the resource.
Comments:Example: “Aves” for a bird key or a bird image collection. Do not add a rank (“Class Aves”) in this field. If the resource contains a single taxon, this should be placed only in Scientific Name, leaving Lowest Common Taxon empty. Where the subject of an image are several species of ducks with trees visible in the background, Taxonomic Coverage would still be Anatidae (and not Biota).
Name:Scientific Name
Normative URI: dwc:scientificName[6]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Scientific taxon names of organisms represented in the media resource (with date and authorship information if available) of the lowest level taxonomic rank that can be applied.
Comments:The Scientific Name may possibly be a Genus or Family name, if this is the most specific identification available. Where multiple taxa are the subject, multiple names may be given. If possible, add this information here even if the title or caption of the resource already contains scientific names. Where the list of scientific names is impractically large (e. g., media collections or identification tools), the number of taxa should be given in Taxon Count (see below). If possible, please do not repeat the Taxonomic Coverage here. Do not use abbreviated Genus names ("P. vulgaris"). It is recommended to provide author citation to scientific names, to avoid ambiguities in the presence of homonyms (the same name created by different authors for different taxa). Identifier qualifications should be supplied in the Identification Qualifier (DO WE HAVE THIS???) term rather than here.
Name:Common Name
Normative URI: dwc:vernacularName[6]
  Layer: Core — Required: No — Repeatable: Yes
Definition: Common (= vernacular) names of the subject in one or several languages. The ISO language name should be given in parentheses after the name if not all names are in Metadata Language.
Comments:Applicable only if the resource relates to a single taxon. The ISO language codes after the name should be formatted as in the following example: 'abete bianco (it); Tanne (de); White Fir (en)'. If names are known to be male- or female-specific, this may be specified as in: 'ewe (en-female); ram (en-male);'.
Name:Taxon According To
Normative URI: dwc:taxonAccordingTo[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: The taxonomic authority used to apply the name to the taxon, e. g., a book or web service from which the name comes from.
Comments:Examples are "ITIS", "Catalogue of Life", "Peterson's guide for birds".
Name:Scientific Name GUID
Normative URI: dwc:taxonID[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: Equivalent to Scientific Name, but using GUIDs such to refer to the taxon names or concepts.
Name:Scientific Name Synonym
Normative URI:

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mrtg:scientificNameSynonym [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: One or several scientific names that are synonyms to the Scientific Name may be provided here.
Comments:The primary purpose of this is in support of resource discovery, not developing a taxonomic synonymy. Misidentification or misspellings may thus be of interest. Where multiple taxa are present in a resource and multiple Scientific Names are given, the association between synonym and name is not discoverable.
Name:Identified By
Normative URI: dwc:identifiedBy[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: The name(s) of the person(s) who applied the Scientific Name to the sample.
Name:Date Identified
Normative URI: dwc:dateIdentified[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: The date on which the person(s) given under Identfied By applied a Scientific Name to the resource.
Comments:What happens if there is more than 1 taxon on the media resource? --BobMorris 18:50,30 February 2010 (CEST)
Name:Taxon Count
Normative URI:

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mrtg:taxonCount [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: An exact or estimated number of taxa represented by the media resource.
Comments:It is recommended to give an exact or estimated number of specific taxa in any case, even were a complete list of taxa is not available or practical. Please try to give this information even where not required. The count should best contain only the taxa covered fully or primarily by the resource. For a taxon page and most images this will be “1”, i. e. other taxa mentioned or in the background should not be counted. However, sometimes a resource may illustrate an ecological or behavioral entity with multiple species, e. g. a host-pathogen interaction. This should be a single integer number. Leave the field empty if you cannot estimate the information (do not enter 0).. Has to be featured in the media.

A single number in this item is assumed to be a count of taxa at the lowest applicable taxon rank. Where it is desired to specify counts of genera, families, etc., additional taxon counts may be added which in parentheses provide the rank (in the metadata language) at which the count was taken. Example: "12 (family)".

Although of special interest for collections, this is also highly relevant to singular resources addressing many taxa (such as identification tools).
Name:Subject Part
Normative URI:

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mrtg:subjectPart [2]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: The portion of the organism, environment, etc. shown or particularly well illustrated.
Comments:No formal encoding scheme as yet exists. Examples are "whole body", "head", "flower", "leaf", "canopy" (of a rain forest stand).
  • See comment in discussion below about a nascent encoding scheme.--Steve Baskauf 16:42, 30 April 2009 (CEST)
Name:Subject Sex
Normative URI: dwc:sex[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: A description of the sex of any organisms featured within the media, when relevant to the subject of the media, e.g., male, female, hermaphrodite, dioecious.
Name:Subject Life Stage
Normative URI: dwc:lifeStage[6]
  Layer: Extended — Required: No — Repeatable: Yes
Definition: A description of the life-cycle stage of any organisms featured within the media, when relevant to the subject of the media, e.g., larvae, juvenile, adult.
Name:Subject Orientation
Normative URI:

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mrtg:subjectOrientation [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: Specific orientiation (= direction, view angle) of the subject represented in the media resource with respect to the acquisition device.
Comments:Examples: "dorsal", "ventral", "frontal", etc. No formal encoding scheme as yet exists.
Name:Subject Preparation Technique
Normative URI: dwc:preparations[6]
  Layer: Extended — Required: No — Repeatable: No
Definition: Free form text describing the techniques used to prepare the subject prior or while creating the media resource.
Comments:Examples for such techniques are: Insect under CO2, cooled to immobility, preservation with ethanol or formaldehyde. See also Resource Creation Technique for technical aspects of digital media object creation.


Technical Metadata Vocabulary

Name:Location Created
Normative URI: http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/LocationCreated [5]
  Layer: Core — Required: No — Repeatable: Yes
Definition: The location at which the media recording instrument was placed when the media was created.
Comments:The distinction between location shown and created is often irrelevant, and metadata may be assumed to be referring to location shown. However, in the case of position data automatically recorded by the instrument (e.g. EXIF GPS data) LocationCreated should be used to maintain information accuracy.
Name:Date and Time Digitized
Normative URI: k2n:Digitization_Date [8]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: Date the first digital version was created, where different Date and Time Original (e.g. where photographic prints have been scanned). The date and time must comply with the World Wide Web Consortium (W3C) datetime practice, which requires that date and time representation correspond to ISO 8601:1998, but with year fields always comprising 4 digits. This makes datetime records compliant with 8601:2004. AC datetime values may also follow 8601:2004 for ranges by separating two IS0 8601 datetime fields by a solidus ("forward slash", '/'). See also the wikipedia IS0 8601 entry for further explanation and examples.
Comments:This is often not the file creation or modification date. Use the international (ISO/xml) format yyyy-mm-ddThh:mm (e. g. "2007-12-31" or "2007-12-31T14:59"). Where available, timezone information should be added. In the case of digital images containing EXIF, whereas the exif capture date does not contain time zone information, exif GPSDateStamp and GPSTimeStamp may be relevant as these include time-zone information. Compare also MWG (2008), which has best practice on handling time-zone-less EXIF date/time data.
Name:Capture Device
Normative URI:

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mrtg:captureDevice [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: Free form text describing the device or devices used to create the resource.
Comments:It is best practice to record the device; this may include a combination such as camera plus lens, or camera plus microscope. Examples: "Canon Supershot 2000", "Makroscan Scanner 2000", "Zeiss Axioscope with Camera IIIu", "SEM (Scanning Electron Microscope)".
Name:Resource Creation Technique
Normative URI:

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mrtg:resourceCreationTechnique [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: Information about technical aspects of the creation and digitization process of the resource. This includes modification steps ("retouching") after the initial resource capture.
Comments:Examples: Encoding method or settings, numbers of channels, lighting, audio sampling rate, frames per second, data rate, interlaced or progressive, multiflash lighting, remote control, automatic interval exposure.

Annotating whether and how a resource has been modified or edited significantly in ways that are not immediately obvious or expected to consumers is of special significance. Examples for images are: Removing a distracting twig from a picture, moving an object to a different surrounding, changing the color in parts of the image, or blurring the background of an image. Modifications that are standard practice and expected or obvious to users are not necessary to document; examples of such expected include changing resolution, cropping, minor sharpening or overall color correction, clearly perceptable modifications (adding arrows or labels, combination or multiple pictures into a table. If it is only known that significant modifications were made, but no details are known, a general statement like “Media may have been manipulated to improve appearance” may be appropriate.

See also Subject Preparation Technique.


Service Access Point Vocabulary

See Discussion at ServiceAccessPoint especially as to whether Class structure is correct. --BobMorris 04:10, 15 August 2009 (CEST)

ServiceAccessPoint Class

Name:Access Point
Normative URI:

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mrtg:hasServiceAccessPoint [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: reference to an instance of a class describing network access to the media resource, or related resources, that the metadata describes. What constitutes a class is dependent on the representation (i.e. XML Schema, RDF, etc.)
Comments:Use with the properties below. In particular, there is little point to having an instance of this class without a value for the Access URL and perhaps the Format. Implementers in specific constraint languages such as XML Schema or OWL may wish to make those two properties mandatory on instances.


Service Access Point Properties

Name:Access URL
Normative URI:

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mrtg:accessURL [2]
  Layer: Core — Required: No — Repeatable: No
Definition: URL of the resource itself
Comments:For individual resources only. Use this field if only one quality level is available (as it is typical for taxon pages or keys!) Value might point to something offline, such as a published CD, etc.
Name:Format
Normative URI: dcterms:format [1]
  Layer: Core — Required: No — Repeatable: No
Definition: The technical format of the resource (file format or physical medium).
Comments:Recommended best practice is to use a controlled vocabulary such as the list of Internet Media Types [MIME]. This item is recommended for offline digital content. In cases where the provided URL includes a standard file extension from which the format can be inferred it is permissible to not provide this item.

Three types of values are acceptable: (a) any MIME type; (b) common file extensions like txt, doc, odf, jpg/jpeg, png, pdf; (c) the following special values: Data-CD, Audio-CD, Video-CD, Data-DVD, Audio-DVD, Video-DVD-PAL, Video-DVD-NTSC, photographic slide, photographic print.

Compare Type for the content-type.
Name:Variant
Normative URI:

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mrtg:variant [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: What this ServiceAccessPoint provides. Permitted values are "Thumbnail", "Trailer", "Lower Quality", "Medium Quality", "Good Quality", "Best Quality", "Offline"
Comments:*Thumbnail: ServiceAccessPoint provides a thumbnail image, short sound clip, or short movie clip that can be used to represent the media object, typically at lower quality and higher compression than the preview object. A typical size for a tiny thumbnail image may be 50-100 pixels in the longer dimension.
  • Trailer: ServiceAccessPoint provides video clip preview, in the form of a specifically authored "Trailer", which may provider somewhat different content than the original resource
  • Lower Quality: ServiceAccessPoint provides a lower quality version of the media resource, suitable e.g. for web sites.
  • Medium Quality: ServiceAccessPoint provides a medium quality version of the media resource, e.g. shortened in duration, or reduced size, using lower resolution or higher compression causing moderate artifacts.
  • Good Quality: ServiceAccessPoint provides a good quality version of the media resource intended for resources displayed as primary information; e.g. an image between 800 and 1600 px in width or height.
  • Best Quality: ServiceAccessPoint provides the highest available quality of the media resource, whatever its resolution or quality level.
  • Offline: ServiceAccessPoint provides data about an offline resource.
Name:Extent
Normative URI: dcterms:extent [1]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: The size, dimensions, or duration of the media resource.
Comments:Best practices are: Extent as length/running time should use standard abbreviations of the metadata language (for English "20 s", "54 min"). Extent of images or video may be given as pixel size ("2000 x 1500 px"), or as file size (using kB, kByte, MB, MByte).
Name:Further Information URL
Normative URI:

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mrtg:furtherInformationURL [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: The URL of a Web site that provides additional information about (this version of) the media resource
Name:Licensing Exception Statement
Normative URI:

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mrtg:licensingException [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: The licensing statement for this version of the media resource if different from that given in the Licensing Statement field of the resource
Comments:Required only if this version has different licensing than that of the media resource. E.g. the highest resolution version may be more restricted than lower resolution versions
Name:Availability Exception (see Key2Nature)
Normative URI:

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mrtg:availabilityException [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: The licensing statement for this version of the media resource if different from that given in the Licensing Statement field of the resource
Name:Version Description
Normative URI:

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mrtg:versionDescription [2]
  Layer: Technical-Extension — Required: No — Repeatable: No
Definition: Text that describes this version


Related Resources Vocabulary

Name:Collection Reference By ID
Normative URI:

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mrtg:containingCollectionID [2]
  Layer: Core — Required: No — Repeatable: No
Definition: An arbitrary code that is unique among a provider's metadata records of type “Collection” and by which the media resources are linked to their collection.
Comments:If the resource is not a collection - this field is for relating a collection to the resource. Each image, sound or taxon page should belong to a collection. Examples: "1", "BrdSng", "328423".
Name:Collection Member By ID
Normative URI:

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mrtg:memberIDinCollection [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: A link
Comments:If the resource is not a collection - this field is for relating a collection to the resource. Each image, sound or taxon page should belong to a collection. Examples: "1", "BrdSng", "328423".
Name:
Normative URI:

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mrtg:relatedResourceID [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: Resource related in ways not specified through a collection.
  • Before-after images
  • Timelapse series
  • Different orientations/angles of view
Name:Provider By ID
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:providerID [2]
  Layer: Extended — Required: No — Repeatable: No
Definition: a Globally unique ID of the provider of the MRTG record that is being provided.
Comments:If the resource is not a provider - this item is for relating the resource to a provider, using an arbitrary code that is unique for a provider, contributing partner, or aggregator, or other roles (potentially defined by MARC, OAI) and by which the media resources are linked to the provider. -
Name:Derived From
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:derivedFrom [2]
  Layer: Core — Required: No — Repeatable: Yes
Definition: A reference to an original resource from which the current one is derived.
Comments:Derivation of one resource from another is of special interest for identification tools (e. g. a key from an unpublished data set, as in FRIDA, or a PDA key from a PC or web key) or web services (e. g. a name synonymization service being derived from a specific data set). It may very rarely also be known where one image or sound recording is derived from another (but compare the separate mechanism to be used for quality/resolution levels). – Human readable, or doi#, or URL.. Simple name of parent for human readable. Can be repeatedable if a montage of images.
Name:Associated Specimen Reference
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:associatedSpecimenReference [2]
  Layer: Core — Required: No — Repeatable: No
Definition: a reference to a specimen associated with this resource.
Comments:Supports to find a specimen resource, where additional information is available. If several resources relate to the same specimen, these are implicitly related. Examples: for NHM “BM 23974324” for a barcoded or “BM Smith 32” for a non-barcoded specimen; for UNITS: “TSB 28637”; for PMSL: “PMSL-Lepidoptera-2534781”. Ideally this could be a URI identifying a specimen record that is online available.
Name:Associated Observation Reference
Normative URI:

Information about submission as TDWG standard
MRTG Wiki Homepage
Current Schema Draft. This version is under internal review as part of the submission to TDWG.
Audubon Core Non normative document
MRTG Development History
MRTG Meeting Notes
MRTG Best Practices
XML Schema representation of Audubon Core
RDF representation of Audubon Core
MediaWiki Help

mrtg:associatedObservationReference [2]
  Layer: Core — Required: No — Repeatable: No
Definition: A reference to an observation associated with this resource.


Controlled Vocabularies

In several cases MRTG requires or recommends controlled vocabularies. In addition to being referenced in the respective fields, we provide some links to analyses here.

References

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 dcterms = http://dublincore.org/documents/dcmi-terms/
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 mrtg = http://xxx.org/XXX
  3. 3.0 3.1 3.2 xmp = http://ns.adobe.com/xap/1.0/, see XMP Specification Part 1, Sec 8.4 XMP does not have an explicit w3c XML-Schema. An "XMP Schema" is actually defined in RDF.
  4. 4.0 4.1 4.2 xmpRights = http://ns.adobe.com/xap/1.0/rights/, see XMP Specification Part 1, Sec 8.5
  5. 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 Iptc4xmpExt = http://iptc.org/std/Iptc4xmpExt/1.0/xmlns/ - Note: the namespace is not resolvable; as of 2011-06-25 the specification is available as PDF.
  6. 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 dwc = http://rs.tdwg.org/dwc/terms/index.htm
  7. 7.0 7.1 ncd = http://rs.tdwg.org/ontology/voc/Collection#
  8. k2n = http://www.keytonature.eu/std/metadata/2009/xmlns/ - Note: The namespace is not resolvable, the specification can be found here