6.6.4 Relationship to INSPIRE Discovery Services

From Geostandards

Introduction

One major reason for defining metadata elements in INSPIRE is to discover resources. For the proper functioning of the European infrastructure, it is necessary for to be able to find spatial data sets and services and to establish whether they may be used and for what purpose.

Therefore, there exists a logical relationship between INSPIRE metadata elements and INSPIRE Discovery Services. In order to be in conformity with the minimum set of search criteria set out in Article 11(2) of the INSPIRE Directive, the Discovery Service shall support searching with the INSPIRE metadata elements listed in the following table.

Minimum search criteria	INSPIRE metadata elements
keywords	Keyword
classification of spatial data and services; (For spatial data sets and spatial data set series)	Topic category
classification of spatial data and services	Spatial data service type
the quality and validity of spatial data sets	Lineage
degree of conformity with the implementing rules provided for in Article 7(1) of Directive 2007/2/EC	Specification
degree of conformity with the implementing rules provided for in Article 7(1) of Directive 2007/2/EC	Degree
geographical location	Geographic bounding box
conditions applying to the access to and use of spatial data sets and services	Conditions applying to access and use
conditions applying to the access to and use of spatial data sets and services	Limitations on public access
the public authorities responsible for the establishment, management, maintenance and distribution of spatial data sets and services	Responsible party
the public authorities responsible for the establishment, management, maintenance and distribution of spatial data sets and services	Responsible party role
conditions applying to the access to and use of spatial data sets and services	Limitations on public access

The following list of INSPIRE metadata elements could not be derived directly from the INSPIRE Directive. However, in the context of searching for resources, they play an important role to discovery a resource:

• Resource Title
• Resource Abstract
• Resource type
• Unique Resource Identifier
• Temporal Reference

INSPIRE Discovery Services extensions

The INSPIRE Discovery Service technical guidance document defines [1] OpenGIS Catalogue Services Specification 2.0.2 - ISO Metadata Application Profile (1.0.0) as the base specification for catalouge services within INSPIRE.

It is already forseen in this specification to extend a catalouge service instance with additional queryables (i.e. search attributes). This is exactly what is done in the context of INSPIRE: Identify the additional search attribute (see secion above) and describe them in a way that implementors are able to take them into account. That means:

• Additional queryables (e.g. Conformity etc.) have to be specified.
• Queryables have to be documented in the capabilities of each IR Discovery Service instance.

Please refer to INSPIRE Discovery Services Technical guidance document for a comprehensive specification.

The additional queryables are advertised in the capabilities document of a catalouge service instance as follows:

<ows:Constraint name="AdditionalQueryables">
	<ows:Value>Degree</ows:Value>
	<ows:Value>AccessConstraints</ows:Value>
	<ows:Value>OtherConstraints</ows:Value>	
	<ows:Value>Classification</ows:Value>	
	<ows:Value>ConditionApplyingToAccessAndUse</ows:Value>
	<ows:Value>MetadataPointOfContact</ows:Value>
	<ows:Value>Lineage</ows:Value>
	<ows:Value>SpecificationTitle</ows:Value>
	<ows:Value>SpecificationDate</ows:Value>
	<ows:Value>SpecificationDateType</ows:Value>
</ows:Constraint>

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Infrastructure for Spatial Information in the European Community (INSPIRE)