B08 A3pc 90 Diapo Damy En
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Transcript of B08 A3pc 90 Diapo Damy En
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Metadata For the CAENTI
Sylvie Damy – Bénédicte [email protected],[email protected]
LIFC - UFC
Besançon 2008 - International Conference of Territorial Intelligence
October,16th - 17th 2008
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Objectives
Characterization of resources
– in TIS, TICS (editorial workflow)
– in indicators portal
– in the territorial intelligence portal
Metadata
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Outline
• Presentation of Dublin Core Metadata standard
• Presentation of Metadata geographical standard
• Creation of CAENTI Metadata
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What is a metadata ?
• Is a data about data
• The main metadata standard for resources: Dublin Core
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Dublin core
Facilitate the finding, the sharing and the management of information
Two levels : simple and qualifier
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Level : Simple
• Dublin Core comprises fifteen elements
• Each element is optional and may be repeated
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Level: Qualifier
Refines the semantics of the elements in ways that may be useful in resource discovery:
• Element Refinement: makes the meaning of an element more specific
• Encoding Scheme: describes the possible values of an element: controlled vocabularies, formal notations, parsing rules
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The elements
Content Intellectual property Instanciation
Title Creator Date
Subject Publisher Format
Description Contributor Identifier
Type Rights Language
Source
Relation
Coverage
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Title
• Description: The name by which the resource is formally known
• Qualifier: Alternative precises other versions of the title
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Subject
Description: The topic of the content of the resource (expressed as keywords or key phrases or classification codes)
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Description
Description: An account of the content of the resource
Qualifier: TableOfContents A list of subunits of the content of the resource
Qualifier: AbstractA summary of the content of the resource
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Identifier
The four precedent elements characterize the resource in a general way
To characterize in a unique way a resource the Identifier element is used
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Identifier
Description: An unambiguous reference to the resource within a given context: a string or number conforming to a formal identification system (URI, URL, DOI, ISBN)
Qualifier: bibliographicCitation is a bibliographic reference for the resource
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Source
Description: An identifier of a resource from which the present resource is derived. The present resource may be derived from the source resource in whole or part.
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Relation
This element links the resource to the others
Description: An identifier of a related resource
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Relation – Qual.
Most of the refinements of Relation are expressed as "reciprocals" and may be used to link resources in two directions
isVersionOf - hasVersionisReplacedBy - Replaces
isRequiredBy - Requires
isPartOf - hasPart
isReferencedBy - ReferencesisFormatOf - hasFormat
conformsTo
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Coverage
Description: The extent or scope of the content of the resource
Qualified: SpatialSpatial characteristics of the content of the resource:
geographic names, latitude/longitude, or other established georeferenced values attention to standard schemes and controlled vocabularies
Qualified: TemporalTemporal characteristics of the content of the resource.
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Creator-Publisher-Contributor
are entities (a person, an organization, or a service) responsible for:
• designing the content of the resource: creator
• making the resource available: publisher
• making contributions to the content of the resource: contributor
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Rights
Description: Information about rights held in and over the resource
Qualifier: accessRightsInformation about who can access the resource or an indication
of its security status. Qualifier: licenseA legal document giving official permission to do something
with the resource. Recommended best practice is to identify the license using a URI.
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Date
Description: A date associated with an event in the life cycle of the resource (controled vocabulary: ISO 8601)
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Date – Qual.
Created
Valid
Available
Issued
Modified
DateAccepted
DateCopyrighted
DateSubmitted
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Type
Description: The nature or genre of the content of the resource (image, sound, text, etc) selected from a controlled vocabulary (ex: DCMI Type Vocabulary)
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Format
Description: more precise than the element type. Describes the file format of the resource. Format may be used to determine the software, hardware or other equipment needed to display or operate the resource.
Qualifier Extent precises the size or duration of the resource
Qualifier Medium gives the material or physical carrier of the resource.
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Language
Description: language of the intellectual content of the resource (RFC 3066)
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Other elements
• Audience• Provenance• RightsHolder• Instructional Method• Acrual Method• Periodicity• Policy
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Others metadata formats
Specific metadata standards related to geography
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ISO 19115
• Defines a schema for describing geographic resources
• Provides information about:– the identification
– the extent
– the quality
– the spatial and temporal schema
– spatial reference
– distribution of digital geographic data
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ArcGIS
• Is an integrated family of GIS software products for building a complete GIS
• It provides metadata format following the FGDC CSDGM or ISO 19115 standards
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The European INSPIRE project
• Infrastructure for Spatial Information in the European Community
• works on the design of spatial metadata for the European Community
• takes account of other international standards like Dublin Core or ISO 19115
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Creation of the CAENTI Metadata
Dublin Core is suitable to describe in a general way all the documents, and all the data of the CAENTI
extend Dublin Core to the specificities of the CAENTI
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Encoding schemes
We have to choice encoding scheme for some elements:
• Date• Identifier• Subject …
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New refinements
In some cases Dublin Core elements and qualifiers are not specific enough to express some data in the CAENTI:
• Geographical data (coverage)
• CAENTI rights (rights)
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Storage of Metadata
• May take two forms. Metadata may be:– Outside the resource (for many kinds of numerical
resources such as excel files for example)
– In the resource (in the Web pages for example)
• Must remain transparent to the final users: users must always see the resources with their metadata.
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Choice of language
• Different languages are used to manage and store the Dublin Core metadata: XML, RDF, and HTML … XML and RDF allow the use of schemes and formats
• Query languages exist to do request on data stored with XML and RDF but RDF query language allows to do more requests
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Tools
Actually some tools around the Dublin Core metadata exist and they are closely related to the Web: – DC-Dot automatically creates Web Pages metadata.
– Other tools manage metadata for specific resources such as photography (Photo RDF-Gen) or articles to publish them on the Web (Mathematics Metadata Markup Editor).
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Tools
For manage the CAENTI metadata we will need tools which allow:– the creation and the modification of metadata scheme
– the input of metadata values
– the web publication
– the automatic extraction from some kinds of resources
– the search of resources.
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Link between metadata and resources
• The Dublin Core metadata characterize numerical resources. But they are not related to the data contained in the numerical resources
• In the CAENTI, we need to define metadata for specific data like territorial indicators.
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Conclusion
• With some new refinements, Dublin Core can meet the CAENTI’s needs.
• To do:– for each kind of CAENTI resources, characterize the
useful elements and the refinements
– define or choose tools to manage the CAENTI metadata.
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Relation – Qual.
Most of the refinements of Relation are expressed as "reciprocals" and may be used to link resources in two directions
isVersionOf - hasVersionThe 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.
isReplacedBy - ReplacesThe described resource is supplanted, displaced, or
superseded by the referenced resource.
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Relation – Qual.
isRequiredBy - RequiresThe described resource is required by the referenced
resource, either physically or logically.This relationship is most often seen in relationships between software and documents or applications and hardware and/or software requirements.
isPartOf - hasPartThe described resource is a physical or logical part
of the referenced resource.
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Relation – Qual.
isReferencedBy - ReferencesThe described resource is referenced, cited, or
otherwise pointed to by the referenced resourceisFormatOf - hasFormatThe described resource is the same intellectual
content of the referenced resource, but presented in another format
conformsTo
A reference to an established standard to which the resource conforms
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Date – Qual.Created : Date of creation of the resource.Valid : Date (often a range) of validity of a resource.Available : Date (often a range) that the resource will
become or did become available.Issued : Date of formal publication of the resource.Modified : Date on which the resource was changed.DateAccepted : Date of acceptance of the resource
(e.g. of thesis by university department, of article by journal, etc.).
DateCopyrighted : Date of a statement of copyright.DateSubmitted : Date of submission of the resource
(e.g. thesis, articles, etc.).