In order to be in conformity with the minimum set of search criteria set out in Article 11(2) of Directive 2007/2/EC, the Discovery Service shall support searching with the INSPIRE metadata elements listed in Table 1 of this Annex.
| 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 (For spatial data services) | Spatial data service type |
| The quality and validity of spatial data sets | Lineage |
| The quality and validity of spatial data sets | Spatial resolution |
| 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 |
The following INSPIRE metadata elements or set of elements shall be also available as search criteria:
Resource Title;
Resource Abstract;
Resource type;
Unique Resource Identifier;
Temporal Reference.
To allow for discovering resources through a combination of search criteria, logical and comparison operators shall be supported.
To allow for discovering resources based on the geographic location of the resource, the spatial operator listed in Table 2 shall be supported.
| Operator Name | Property |
|---|---|
| Intersects | Requires the geographic bounding box INSPIRE metadata element to intersect a defined area of interest |
In order to be in conformity with Article 11(1) of Directive 2007/2/EC, the Discovery Service shall provide the operations listed in Table 3 of this Annex.
| Operation | Role |
|---|---|
| Get Discovery Service Metadata | Provides all necessary information about the service and describes service capabilities |
| Discover Metadata | The Discover Metadata operation allows requesting INSPIRE metadata elements of resources based on a query statement to be retrieved from the target Discovery Service |
In order to be in conformity with Article 12 of Directive 2007/2/EC, the Discovery Service shall support the operations listed in Table 4 of this Annex.
| Operation | Role |
|---|---|
| Publish Metadata | The Publish Metadata operation allows editing INSPIRE metadata elements of resources in the Discovery Service (push or pull metadata mechanisms). Editing meaning insert, update and delete |
| Link Discovery Service | The Link Discovery Service function allows the declaration of the availability of a Discovery Service for the discovery of resources through the Member State Discovery Service while maintaining the resource metadata at the owner location |
The request and response parameters of each operation complete the description of each operation and form an integral part of the Discovery Service technical specification.
The Get Discovery Service Metadata Request parameter indicates the natural language for the content of the Get Discovery Service Metadata Response
The Get Discovery Service Metadata Response shall contain the following sets of parameters:
Discovery Service Metadata,
Operations Metadata,
Languages.
The Discovery Service Metadata parameters shall at least contain the INSPIRE metadata elements of the Discovery Service.
The Operations Metadata parameter provides metadata about the operations implemented by the Discovery Service. These metadata parameters shall describe each operation. It shall at least provide the following:
indicate for the Publish Metadata if the Pull Mechanism, the Push Mechanism or both are available;
describe each operation, including as a minimum a description of the data exchanged and the network address.
Two language parameters shall be provided:
the Response Language parameter indicating the natural language used in the Get Discovery Service Metadata Response parameters,
the Supported Languages parameter containing the list of the natural languages supported by the Discovery Service.
This Discovery Metadata Request contains the following parameters:
Language,
Query.
The Language parameter indicates the natural language requested for the content of the Discover Metadata Response.
The Query parameter shall contain the combination of search criteria as specified in part A.
The Discover Metadata Response parameter shall contain at least the INSPIRE metadata elements of each resource matching the query.
The Publish Metadata function enables the publication of the INSPIRE metadata elements of resources at the Discovery Service. Two alternatives are:
Push Mechanism: allowing editing of the INSPIRE metadata elements of resources accessible from the Discovery Service,
Pull Mechanism: allows the Member State Discovery Service to pull INSPIRE metadata elements of resources from a remote location.
At least one of the above alternatives shall be supported.
The Edit Metadata Request parameter provides all information requested for INSPIRE metadata elements of resources to be inserted, updated or deleted at the Discovery Service.
The Collect Metadata Request parameter provides all information about the remote location required to retrieve the available metadata of resources. It shall include as a minimum the INSPIRE metadata elements of the dedicated spatial data service.
The Link Discovery Service operation allows the declaration of the availability of a Discovery Service compliant with this Regulation, for the discovery of resources through the Member State Discovery Service while maintaining the resource metadata at the owner location.
The Link Discovery Service Request parameter shall provide all information about the Public Authority’s or Third Party’s Discovery Service compliant with this Regulation, enabling the Member State Discovery Service to get resources metadata based on a combination of search criteria from the Public Authority’s or Third Party’s Discovery Service and to collate it with other resources metadata.