The catalog metadata should also use SensorML where applicable and not contradictory.
e The catalog metadata that can be queried shall be distinguished from the catalog metadata that can only be retrieved. All the catalog metadata that can be queried
should also be able to be retrieved. f The catalog metadata shall be divided into two or more metadata groups suitable for
input at different times. Also, separate metadata groups shall be defined for metadata that is applicable to many images and for metadata that is applicable to single images.
5.5.3 Archive metadata
In addition to the common requirements specified in Subclause 5.2, the image metadata specified for use by OWS 1.2 archive servers shall meet all the following requirements:
a The catalog metadata shall be transferred between clients and servers using XML encoding, with the correct encoding and contents specified using XML Schema.
b The archive metadata should adapt OGC Abstract Specification new Topic 11 which contains ISODIS 19115 to adequately describe all the categories and types of
images handled in OWS 1.2. Such adaptation means selecting a suitable subset of this metadata, and extending that metadata as needed for effective query and retrieval.
NOTE The Future Work clause of OGC document 01-053r1 was accepted as an addition to the
Abstract Specification new Topic 11, but has not yet been physically included in Topic 11. Among other things, that clause states that the “Reference system information” parts of ISO 19115 need to be modified
to be more consistent with the new Abstract Specification Topic 2.
c The catalog metadata should use GML and XML encoding of OGC Abstract Specification Topic 2, wherever applicable, especially for coordinate reference
systems and coordinate operations. d The archive metadata should adapt the FGDC Remote Sensing Extensions as needed
to adequately describe all the categories and types of images handled in OWS 1.2. The catalog metadata should also use SensorML where applicable and not
contradictory.
e The archive metadata shall be divided into two or more metadata groups suitable for input at different times. Also, separate metadata groups shall be defined for metadata
that is applicable to many images and for metadata that is applicable to single images.
24
© OGC 2004 – All rights reserved
