A principle goal of metadata is to ensure that the data they describe can be independently understood and used effectively. The ISO Identification Information package provides fields for describing and unambiguously identifying objects associated with the resource.
The ISO 19115 IdentificationInfo entity includes fields for describing the resource, and for unambiguously identifying objects associated with the resource.
Documentation Objectives
The MD_IdentificationInformation Object is an Abstract Object that holds general identification information for all kinds of objects. It is required and there can be any number of these objects in an MD_Metadata container. At present the MD_Identification Object can be instantiated either as a MD_DataIdentification Object, for datasets, or a MD_ServiceIdentification Object, for services.
The MD_Identification Object includes six simple elements shown inside the box in the Figure and eight associated complex objects shown as boxes outside of the MD_Identification Object. The simple elements are primarily textual descriptions that might be presented to users in a summary document or searched using full-text search mechanisms. The organizational/human contact is also included. The complex objects are described in more detail below.
<gmd:identificationInfo>
<gmd:MD_DataIdentification>
<gmd:citation/>
<gmd:abstract/>
<gmd:purpose/>
<gmd:status/>
<gmd:pointOfContact/>
<gmd:resourceMaintenance/>
<gmd:graphicOverview/>
<gmd:descriptiveKeywords/>
<gmd:resourceConstraints/>
<gmd:aggregationInfo/>
<gmd:language/>
<gmd:topicCategory/>
<gmd:extent/>
</gmd:MD_DataIdentification>
</gmd:identificationInfo>