Geographic information metadata for spatial data by Javier Nogueras-Iso

By Javier Nogueras-Iso

Metadata play a primary position in either DLs and SDIs. in general outlined as "structured info approximately information" or "data which describe attributes of a source" or, extra easily, "information approximately data", it truly is a vital requirement for finding and comparing to be had facts. hence, this booklet specializes in the learn of alternative metadata facets, which give a contribution to a extra effective use of DLs and SDIs. the 3 major matters addressed are: the administration of nested collections of assets, the interoperability among metadata schemas, and the mixing of data retrieval ideas to the invention providers of geographic info catalogs (contributing during this technique to stay away from metadata content material heterogeneity)

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Additional info for Geographic information metadata for spatial data infrastructures : resources, interoperability, and information retrieval

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The computation of the subsumption relation (by means of first-order logic proof methods) allows the automatic construction of a classification hierarchy, with conceptual definitions being arranged from the general to the specific. This automatic classification is precisely the advantage with respect to frame-based languages, where classification must be explicitly given by the designer of the knowledge base. , 1989). • Knowledge Interchange Format (KIF) (Genesereth and Fikes, 1992) and its successor Common Logic (CL) (Common Logic Working Group, 2004).

Ontologies have been developed in Artificial Intelligence to facilitate knowledge sharing and reuse. As it is mentioned in (Denny, 2002), the current heir to the artificial intelligence legacy may well be ontologies. But nowadays, SOFTbank E-Book Center Tehran, Phone: 66403879,66493070 For Educational Use. 24 1 Spatial Data Infrastructures and related concepts ontologies are also a popular research topic in various communities such as Natural Language Processing, Cooperative Information Systems, Intelligent Information Integration, Knowledge management or the incipient conception of the Semantic Web.

Specifying the use of a specific controlled vocabulary or encoding scheme); the additional elements and qualifiers that are taken from other application profiles; the refinement of standard definitions; and the conditionality and occurrence of elements. Additionally, it must be noticed that the document ”DCMI Metadata Terms” is an abstract specification of metadata content but when metadata is exchanged, it is usually encoded either as HTML < meta > tags (suitable for embedding in the < head > ... < head > section of the page) or as part of RDF(Resource Description Framework) descriptions (Manola and Miller, 2004).

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