Discovery of Attributes. This enhances interoperability by allowing an information client to configure itself to query newly discovered metadata repositories. Ease of Implementation. It should be easy to implement a search engine supporting the query language. The DSTC recommends that the query language use HTTP as the transport mechanism and that the syntax of returned metadata records should be based on XML, possibly in RDF format.
Some customers require secure or authenticated access to their data or subsets of their data.
The query infrastructure should support this. Specification of Returned Results. Including the specification of result format and fields, and the size of the result set to be returned. The query infrastructure should support queries and results described using the Unicode character set. Additionally, the query infrastructure should be able to identify the language of the query values and returned records.