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15 operation mode, e.g. a collection of all the TerraSAR-X spotlight mode data. The
collection metadata describes these sets by providing the identifier, the description, the possible geographical and temporal extent, the common attributes, etc.
The metadata for collection has been modelled following the ISO 19115 standard.
8.4 Service Metadata
This is Human readable service metadata about available Earth Observation related services. It provides users sufficient information to assess and to access these services.
Whereas the metadata stored in the UDDI registry provides standard web-service discovery metadata used for example for service orchestration, this service discovery
metadata is more tailored to the Earth Observation needs, e.g. it is in charge of answering questions like: finding an order service allowing ordering products of a specified
collection; finding a Web Coverage Service returning products of a specific collection; etc.
This metadata is defined by identifying the minimum set of elements of the ISO 19119 Service Metadata which are sufficient for discovering the FedEO services.
The following concepts have to be represented in this Service Metadata: o
Services are defined by: o
Identification info e.g. contact information, usage restrictions, regiontime period of applicability, etc.;
o Operations and related parameters
o Dependencies i.e. how operations depend on results of other operations;
o Data metadata may be subject to restrictions and therefore
o not visible for each user of the catalogue service
o Access control not handled by the catalogue service natively
8.5 Product Metadata
This is the metadata used for describing the products derived by earth observation satellites that are managed by the Catalogue service of the FedEO architecture.
o Earth observation satellite products are mainly characterised by the following
attributes: o
satellite and sensor acquiring the data; o
the time when the data has been acquired;
