OSGeodata metadata exchange model: Unterschied zwischen den Versionen
Aus Geoinformation HSR
K (→Dublin Core and its interpretation in spatial metadata) |
K (→Dublin Core and its interpretation in spatial metadata) |
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Zeile 9: | Zeile 9: | ||
* '''Relation''': reference - Reference to other metadata records - especially useful for map service types (WxS) pointing to data service types (= file, database?) | * '''Relation''': reference - Reference to other metadata records - especially useful for map service types (WxS) pointing to data service types (= file, database?) | ||
− | * '''Type''': text or enum - Protocol type, e.g. file, WMS, WFS, etc... | + | * '''Type''': text or enum - Protocol type, e.g. file, WMS layer, WFS feature set, etc... '''IMPORTANT FOR SERVICE DISCOVERY''' |
* '''Identifier''': string - Unique id to identify an object in a certain context (URL or URN). | * '''Identifier''': string - Unique id to identify an object in a certain context (URL or URN). | ||
* '''Title''': string - Title | * '''Title''': string - Title |
Version vom 5. August 2006, 11:19 Uhr
Proposal of an information model to exchange spatial metadata
Initial version by S.F.Keller. See also OSGeodata.
Idea: Take the smallest possible information model for geo-metadata which describes data. Dublin Core (DC) is the most well known model.
Dublin Core and its interpretation in spatial metadata
This is the full list of (possibly repeatable) attributes from DC together with its semantic interpretation and/or enumeration list:
- Relation: reference - Reference to other metadata records - especially useful for map service types (WxS) pointing to data service types (= file, database?)
- Type: text or enum - Protocol type, e.g. file, WMS layer, WFS feature set, etc... IMPORTANT FOR SERVICE DISCOVERY
- Identifier: string - Unique id to identify an object in a certain context (URL or URN).
- Title: string - Title
- Coverage.box: - Rectangular box (mandatory) in WGS84
- Coverage.name: String - (optionally) a geographic name
- Description: string - Some free text
- Subject: enum - Classification from ISO 19115 as enum type
- Language: enum - ISO Code
- Format: string - File type or name of originating source system
- Source: string - Lineage information
- Date: date - Publication date or date of last change
- Creator: string - Data owner, else: data capturer
- Publisher: string - Distribution informatione
- Rights: string - License information about the data
- Contributor: string - Leave unused?
- Audience: string - Not used or 'GIS' as a constant
Attributes to discuss further (all are probably enums): Type (protocol), Identifier, Coverage.box and Coverage.name and Subject.
Example in GeoRSS (simple) encoding
...