OSGeodata metadata exchange model

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.

This is the full list of (possibly repeatable) attributes from DC together with its proposed 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.

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