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 ETB Datamodel: Minimum set of Quality Descriptors

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•  Introduction to Collection Level Descriptions
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•  Related Article: First Step Strawman
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•  Related Article: Learning Technologies Workshop - CEN/ISSS
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The first version of the ETB datamodel is ready. It is combined from two sets of elements. ETB Metadata Element Set deals on resource level and Collection Level Descriptors (CLD) are to identify the entire collection of resources.

Take a look at SCHEMAS' Registry on ETB metadata element set:

ETB Metadata on resource level Element Refinement Encoding Scheme
Label: DC.Title
Definition: A name given to the resource.

Type: Element

Comment: -

See also: -

ETB Obligation: Mandatory
- -
Label: DC.Language
Definition: A language of the intellectual content of the resource.

Type: Element

Comment: Encoding Scheme for this element is ISO 639-1.Tags for the identification of languages.

See also: -

ETB Obligation: Mandatory
- Label: Tags for the identification of languages
Definition: 2-character language code from ISO 639-1.

Type: Encoding Scheme

Comment: -

See also: RFC 3066
Label: DC.Subject
Definition: The topic of the content of the resource.

Type: Element

Comment: Encoding Scheme for this element is ETB Thesaurus. 

See also: Thesaurus on the ETB site

ETB Obligation: Mandatory
- Label: ETB Thesaurus
Definition: A controlled and hierarchical vocabulary developed by ETB for the European school sector.

Type: Encoding Scheme

Comment: .

See also: Thesaurus on the ETB site
Label: DC.Description
Definition: An account of the content of the resource.

Type: Element

Comment: -

See also: -

ETB Obligation: Mandatory
- -
Label: DC.Identifier
Definition: An unambiguous reference to the resource within a given context.

Type: Element

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Mandatory
- Label: Uniform Resource Identifier (URI)
Definition: A simple and extensible compact string of restricted characters used for identification.

Type: Encoding Scheme

Comment: -

See also: RFC 2396
Label: DC.Audience
Definition: The intended users of the resource.

Type: Element

Comment: The encoding scheme for this element is ETB UserLevel.

See also: -

ETB Obligation: Mandatory
- Label: ETB UserLevel
Definition:
Type: Encoding Scheme

Comment: Controlled list of Audience Vocabulary 

http://etb.eun.org/voc/audience.doc

See also: -
Label: DC.Creator
Definition: An entity primarily responsible for making the content of the resource.

Type: Element

Comment: The entity can be either individuals or organisations.

See also: -

ETB Obligation: Optional
- -
Label: Subject Keywords
Definition: The topic of the content of the resource.

Type: Element

Comment: Free text.

See also: -

ETB Obligation: Optional
Label: Subject ThumbNail
Definition: A pictorial representation of a visual resource eg, an animation or an image.

Type: Element Refinement

Comment: Possibility to describe content with a thumb nail from a film, instead of only textual keywords and classification.

Encoding scheme for this element refinement is Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Optional
-
Label: Subject AudioSample
Definition: A brief sample of an audio resource, for instance recorded birdsong or language courses

Type: Element Refinement

Comment: Possibility to describe content with a sample from an audio file instead of only textual keywords and classification.

Encoding scheme for this element refinement is Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Optional
-
Label: DC.Publisher
Definition: An entity responsible for making the resource available.

Type: Element

Comment: The entity can be individuals or organisations

See also: -

ETB Obligation: Optional
- -
Label: DC.Contributor
Definition: An entity responsible for making contributions to the content of the resource.

Type: Element

Comment: The entity can be individuals or organisations

See also: -

ETB Obligation: Optional
- -
Label: DC.Date
Definition: A date associated with an event in the life cycle of the resource.
Type: Element

Comment: Typically, Date will be associated with the creation or availability of the resource.
See also: -

ETB Obligation: Optional
Label: Date Created
Definition: Date of creation of the resource.

Type: Element Refinement

Comment: Encoding Schemes for this element refinement are W3C Date Time Format (W3CDTF) and DCPERIOD.

See also: -

ETB Obligation: Optional
Label: W3C Date Time Format (W3CDTF)
Definition: Encoding rules for dates and times - based on ISO8601

Type: Encoding Scheme

Comment:
See also: W3C Date Time Format (W3CDTF)

ETB Obligation: Optional
Label: Date Issued
Definition: Date of formal issuance (eg, publication) of the resource.

Type: Element Refinement

Comment: Encoding Schemes for this element refinement are W3C Date Time Format (W3CDTF) and DCPERIOD.

See also: -

ETB Obligation: Optional
Label: Date Modified
Definition: Date on which the resource was changed.

Type: Element Refinement

Comment: Encoding Schemes for this element refinement are W3C Date Time Format (W3CDTF) and DCPERIOD.

See also: -

ETB Obligation: Optional
Label: Date Available
Definition: Date (often a range) that the resource will become or did become available

Type: Element Refinement

Comment: Encoding Schemes for this element refinement are W3C Date Time Format (W3CDTF) and DCPERIOD.

See also: -

ETB Obligation: Optional
Label: DCPERIOD
Definition: Specification of the limits of a time interval, and methods for encoding this in a text string.

Type: Encoding Scheme

Comment: -

See also: DCPERIOD

ETB Obligation: Optional
Label: Date Valid
Definition: Date (often a range) of validity of a resource

Type: Element Refinement

Comment: Encoding Schemes for this element refinement are W3C Date Time Format (W3CDTF) and DCPERIOD.

See also: -

ETB Obligation: Optional
Label: DC.Type
Definition: The nature or genre of the content of the resource.

Type: Element

Comment: Encoding scheme for this element is the ETB Type Vocabulary. Available at http://etb.eun.org/voc/type.doc

See also: -

ETB Obligation: Optional
- Label: ETB Type Vocabulary
Definition: A controlled vocabulary indicating the nature or genre of the resource.

Type: Encoding Scheme

Comment:
http://etb.eun.org/voc/type.doc
ETB Obligation: Optional
Label: DC.Format
Definition: The physical or digital manifestation of the resource.
Type: Element

Comment: Typically, Format may include the media-type or dimensions of the resource. Format may be used to determine the software, hardware or other equipment needed to display or operate the resource. Examples of dimensions include size and duration.
See also: -

ETB Obligation: Optional
Label: Format Medium
Definition: The media-type of the resource.

Type: Element Refinement

Comment: This element should be used with encoding scheme Internet Media Types (IMT) [MIME]

See also: -

ETB Obligation: Optional
Label: Internet Media Types (IMT) [MIME]
Definition: Controlled vocabulary defining computer media formats.

Type: Encoding Scheme

Comment: -

See also: RFC 2046

ETB Obligation: Optional
Label: Format Extent
Definition: A free text describing the size or duration of the resource.

Type: Element Refinement

Comment: Extent covers both the size and duration of a resource.

See also: -

ETB Obligation: Optional
Label: Format Requirements
Definition: A free text describing necessary hardware and software requirements essential for the use of the resource being described.

Type: Element Refinement

Comment: There are no recommendations for the usage of Requirements from DCMI.

See also: -

ETB Obligation: Optional
Label: DC.Source
Definition: A reference to a resource from which the present resource is derived.

Type: Element

Comment: Encoding Scheme for this element are Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Optional
- Label: Uniform Resource Identifier (URI)
Definition: A simple and extensible compact string of restricted characters used for identification.

Type: Encoding Scheme

Comment: -

See also: RFC 2396
Label: DC.Relation
Definition: A reference to a related resource.
Type: Element

Comment: Recommended best practice is to reference the resource by means of a string or number conforming to a formal identification system.
See also: -

ETB Obligation: Optional
Label: IsVersionOf
Definition: The described resource is a version, edition, or adaptation of the referenced resource. Changes in version imply substantive changes in content rather than differences in format.

Type: Element Refinement

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also:
ETB Obligation: Optional
-
Label: HasVersion
Definition: The described resource has a version, edition, or adaptation, namely, the referenced resource.

Type: Element Refinement

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also:
ETB Obligation: Optional
-
Label: IsFormatOf
Definition: The described resource is the same intellectual content of the referenced resource, but presented in another format.

Type: Element Refinement

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Optional
-
Label: HasFormat
Definition: The described resource pre-existed the referenced resource, which is essentially the same intellectual content presented in another format.

Type: Element Refinement

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -

ETB Obligation: Optional
-
Label: DC.Coverage
Definition: The extent or scope of the content of the resource.
Type: Element

Comment: Coverage will typically include spatial location (a place name or geographic coordinates), temporal period (a period label, date, or date range) or jurisdiction (such as a named administrative entity).
See also: -

ETB Obligation: Optional
Label: Temporal Coverage
Definition: Free keywords describing historical periods should be used for describing temporal coverage.

Type: Element Refinement

Comment: -

See also: -

ETB Obligation: Optional

Label: Getty Thesaurus of Geographic Names (TGN)
Definition: A structured vocabulary containing names and other information about places. It includes all continents and nations of the modern political world, as well as historical places. It includes physical features and administrative entities, such as cities and nations.

Type: Encoding Scheme

Comment: -

See also: -

ETB Obligation: Optional

Label: Spatial Coverage
Definition: The name of a place.

Type: Element Refinement

Comment: Use with Getty Thesaurus of Geographic Names (TGN) as Encoding Scheme.

See also: -

ETB Obligation: Optional
Label: DC.Rights
Definition: Information about rights held in and over the resource.

Type: Element

Comment: This can be a rights management statement, an identifier that links to a rights management statement, or an identifier that links to a service providing information about rights management for the resource.

Encoding Scheme for this element is Uniform Resource Identifier (URI). It is also possible to write in free text.

See also:The controlled vocabulary created by ETB at http://etb.eun.org/voc/rights.doc

ETB Obligation: Optional
- See also:The controlled vocabulary created by ETB at http://etb.eun.org/voc/rights.doc
ETB Obligation: Optional
Label: ETB UserComments 
Definition:
Type: Element 

Comment: Free text without a controlled list of

 words. URL pointing to to a dynamic database within 

EUN Native Repository where users can insert the 

comments and experiences.

See also:

ETB Obligation: Optional
-

-

Label: LearningSituation
Definition: A reduced version of GEM LearningSituation Vocabulary 

Type: Element

Comment: GEM LearningSituation Vocabulary 

See also: GEM vocabulary
see below
http://etb.eun.org/voc/pedagogical.doc
ETB Obligation: Optional
- Label: LearningSituation
Definition: A reduced version of GEM LearningSituation Vocabulary 

Type: Encoding Scheme

Comment: Reduced from GEM LearningSituation Vocabulary 

See also: http://etb.eun.org/voc/pedagogical.doc
ETB Obligation: Optional 
Label: Aggregation.Level
Definition: The functional size of the resource

Type: Element

Comment: IMS Learning Resource Meta-data Information Model, Version 1.2 Final Specification ,Restricted range: 1 - 4

See also: see below, http://etb.eun.org/voc/aggregation.doc

ETB Obligation: Optional
- Label: Aggregation.Level
Definition: The functional size of the resource

Type: Encoding Scheme

Comment: IMS Learning Resource Meta-data Information Model, Version 1.2 Final Specification ,Restricted range: 1 - 4

See also: http://etb.eun.org/voc/aggregation.doc

ETB Obligation: Optional


 
http://www.geminfo.org/Workbench/Metadata/Vocab_Pedagogy.html
 
http://www.imsproject.org/metadata/imsmdv1p2/imsmd_infov1p2.html

Collection Level Description Encoding Scheme
Label:Title
Namespace: DCMES

Definition: The name of the collection.

Type: Element

Comment: -

See also: -
ETB Obligation: Mandatory
-
Label:Subject
Namespace: DCMES

Definition: The topic of the content of the 

resources in the collection.

Type: Element

Comment: Encoding scheme for this element is the ETB Thesaurus.

See also: -
ETB Obligation: Mandatory
Label: ETB Thesaurus
Namespace: ETB CLD

Definition: A controlled and hierarchial vocabulary indicating the subject of the resources in the collection.

Type: Encoding Scheme

Comment:
See also: Thesaurus on the ETB site
Label:Description
Namespace: DCMES

Definition: An account of the content of the resources in the collection.

Type: Element

Comment: Free text.

See also: -
ETB Obligation: Mandatory
-
Label:Publisher
Namespace: DCMES

Definition: An entity responsible for making the collection available.

Type: Element

Comment: -

See also: -
ETB Obligation: Mandatory
-
Label: Type
Namespace: DCMES

Definition: The nature or genre of the content of the resources in the collection.

Type: Element

Comment: Encoding scheme for this element is the ETB Collection Type Vocabulary.

See also: Available at http://etb.eun.org/voc/type.doc
ETB Obligation: Mandatory
Label: ETB Collection Type Vocabulary
Namespace: ETB CLD

Definition: A controlled vocabulary indicating the nature or genre of the resources in the collection.

Type: Encoding Scheme

Comment:
See also: Available at http://etb.eun.org/voc/type.doc
Label: Identifier
Namespace: DCMES

Definition: An unambiguous reference to the collection within a given context.

Type: Element

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -
ETB Obligation: Mandatory
Label: Uniform Resource Identifier (URI)
Namespace : Dublin Core Qualifiers

Definition: A simple and extensible compact string of restricted characters used for identification.

Type: Encoding Scheme

Comment: -

See also: RFC 2396 <http://www.ietf.org/rfc/rfc2396.txt>
Label: Audience
Namespace: DCMI Education

Definition: A category of user for whom the resource is intended.

Type: Element

Comment: The encoding scheme for this element is ETB  Audience Vocabulary.

See also: Controlled list of Audience Vocabulary 

http://etb.eun.org/voc/audience.doc
ETB Obligation: Mandatory
Label: Audience Vocabulary 
Namespace: ETB CLD

Definition: A controlled vocabulary indicating the target audience of the resources in the collection.
Type: Encoding Scheme

Comment:
See also: Controlled list of Audience Vocabulary 

http://etb.eun.org/voc/audience.doc
Label: Language
Namespace: DCMES

Definition: The language of the metadata of the resources in the collection.

Type: Element

Comment: Encoding scheme for this element is ISO 639-1 - Tags for the identification of language

See also: -
ETB Obligation: Mandatory
Label: ISO 639-1 - Tags for the identification of language
Namespace: Dublin Core Qualifiers

Definition: A two letter language code set taken from ISO 639-1.

Type: Encoding Scheme

Comment: -

See also: ISO 639-1 http://www.loc.gov/standards/iso639-2/langhome.html
Label: Resource Language
Namespace: Renardus CLD

Definition: The language of the content of the resources in the collection.

Type: Element

Comment: Encoding scheme for this element is ISO 639-1 - Tags for the identification of language

See also: -
ETB Obligation: Mandatory
Label: ISO 639-1 - Tags for the identification of language
Namespace: Dublin Core Qualifiers

Definition: A two letter language code set taken from ISO 639-1.

Type: Encoding Scheme

Comment: -

See also: ISO 639-1 http://www.loc.gov/standards/iso639-2/langhome.html
Label: Logotype
Namespace: Renardus CLD

Definition: The URL of the logo (image) of the subject gateway.

Type: Element

Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -
ETB Obligation: Mandatory
Label: Logotype
Namespace: Renardus CLD

Definition: The URL of the logo (image) of the subject gateway.

Type: Encoding Scheme
Comment: Encoding Scheme for this element is Uniform Resource Identifier (URI).

See also: -
Label: Quality Selection Policy
Namespace: ETB CLD

Definition: The collection policy associated with the collection.

Type: Element

Comment: Encoding scheme for this element is a controlled list of quality selection levels.

See also: Proposed Quality selection policy controlled vocabulary-
ETB Obligation: Mandatory
Label:ETB Quality Selection Levels
Namespace: ETB CLD

Definition: A controlled vocabulary indicating the quality selection policy.

Type: Encoding Scheme

Comment:
See also: Proposed Quality selection policy controlled vocabulary
Label:Country
Namespace: RSLP

Definition: The country/state in which the collection is physically located.

Type: Element

Comment: Encoding Scheme for this element is ISO 3166-1 - Tags for the identification of country.

See also: -
ETB Obligation: Mandatory
Label: ISO 3166-1 - Tags for the identification of country
Namespace: Dublin Core Qualifiers

Definition: A two letter country code set taken from ISO 3166-1.

Type: Encoding Scheme

Comment: -

See also: RFC1766 http://www.ietf.org/rfc/rfc1766.txt

This set of Quality Descriptors represents the aspects that the ETB data model judges valuable for quality. The ETB data model is combined from two sets of elements, both dealing with different levels.

The first set is the ETB Metadata Elements which deals with individual resource level. The ETB Metadata element set is created as a minimal common denominator set for the exchange of records over the ETB network i.e. it is not the same as an element set for a repository. The ETB Metadata Element Set can be extended to include some local fields.

First place these Metadata records serve the purpose of building the network of repositories; they are intend to allow the end-user, in this case the repository owner/curators, to decide which resources are to be included in the database in question.

Second place the Metadata Element Set serves to build the EUN Repository, which has teachers and students as end-users. These end-users can search and insert resources into the ETB network. After editorial procedures, the EUN Repository will make the Metadata records of inserted resources available over the ETB network.

The second set is called the Collection Level Descriptors (CLD) which identifies the entire collection of resources. The user's process of resource discovery is improved and simplified by well defined descriptions of the network collections, enhancing information retrieval. In addition, the CLD benefit the collections; the owner or curator of a collection can reveal information about its existence and availability to users in a standardised manner by using a machine-readable format that is structured. More information available about the Collection Level Descriptors on the ETB website at http://www.en.eun.org/eun.org2/goto.cfm?did=3829.

For one collection the CLD is produced only once. All the elements in the CLD list below are needed for their different tasks; the mandatory elements describe each resource in the collection, the optional elements are value adding, which are to be used whenever possible to enable more precise searches.

In the both charts below, the mandatory elements are on the purple background and optional elements are on the light blue background. The elements with questionable status are on the green background.



First version of ETB Data Model:
1) ETB Metadata Element Set

The ETB data element set is based on the EUN metadata element set as well as DCMI with minor extensions from preliminary results from the DC Education Working Group as well as other educational metadata initiatives.

The ETB data element set is purely semantic and is therefore syntax-independent. The set is mainly intended to be used to provide interoperability between national services within the European school sector. It represents a minimal common denominator element set to be used by national services for exchange of metadata.

Since it is expected that the ETB set will be extended with local definitions and variations at each of the national repositories it makes sense to keep it simple. The reason why only a few elements from for instance DC.Education have been added, is because they are not yet endorses recommendations by the DCMI. Use of such elements will be considered as local fields at this stage, and not a part of the ETB minimal common denominator set for exchange of records over the network.

ETB is a multilingual project, and it is important that software operating on the metadata within the ETB network is aware not only of the language of resources described but also the languages used in the descriptions. In this specification of the ETB data element set we therefore state for which elements language specification is necessary. We do not, however, give any recommendations on how this should be done, since that is a syntactical question. It suffices to say that XML, HTML and other possible syntaxes have native mechanisms for indicating what language is used inside an element and that implementors of the ETB data set is encouraged to use them.
 

ETB MES Application Profile
In the ETB MES the following namespaces are used:

The Semantics of ETB Metadata
The semantics for each data element is defined by using the following set of attributes.
Label: A human readable name for the data element.
Definition: A statement that expresses the essential nature of the data element.
Type: Whether the data element is an Element, an Element Refinement), or an Encoding Scheme. Element Refinements make the meaning of an element more specific, without extending it. Encoding Schemes are pointers to schemes that aid in the interpretation of an element value. These schemes include controlled vocabularies and formal notations. In the ETB Metadata Element Set all Elements, Element Refinements and Encoding Schemes are repeatable.
Comment: Remarks on the data element.
See Also: A link to documentation or more information about the data element.
ETB Obligation: Indicates if the data element is required to always or sometimes be present (marked as Mandatory or Optional). The mandatory requirement used in the ETB Metadata Element Set is intended to ensure that particular element values are always included and used consistently. To facilitate the exchange of records within the ETB six elements must be included when describing a resource.
Mandatory: Title, Description, Identifier, Audience, Language and  Subject ETB Thesaurus.
The optional elements need only to be used if the information is appropriate to a given resource.

2) ETB Collection Level Description

Application Profile

The metadata elements are derived from already existing metadata formats for describing resources. Even a metadata format originally constructed for usage at a resource level contains elements which are well suited for description at a collection level.

The Application Profile for ETB consists of both tailor-made elements and elements taken from existing schemas. With the additions and adjustments required to fit the specific environment,
Information:
Author: ETB Partners, edited by R.Vuorikari
Web Editor: Riina Vuorikari
Published: Thursday, 12 Apr 2001
Last changed: Monday, 25 Aug 2003
Keywords: standardisation, interoperability