Welcome to the DataWeb_Server_Docs/Docs_MetadataService web

{ Docs for the metadata service }
The Metadata Service processes queries that retrieve the metadata to be presented in TheDataWeb tools. Metadata is information that describes and defines the data. Without the metadata there would be no datasets or data items to select or tabulate in TheDataWeb tools. The Metadata Service makes queries to the metadata and geography metadata repositories. It is possible to make multiple connections to a single repository at the same time. It is also possible to limit the type of queries allowed on the Metadata Service.

The Metadata engine supplies these functions:

• information discovery
• rules for how hierarchical codesets work
• rules for integrating data
• rules for using data (weighting rules, flag behavior etc.)
• directions to the physical data location
• access controls to data elements

Diagram of Metadata Processing (ingestion, release, replication)

MetaData XML for loading and data management ie. (MIF.XML Metadata Interface File XML)

List of different metadata xml transactions

Process for putting up Metadata and managing it

• Create either MIFXML or MIFText
• (step 1) Load it into the local model metadatabase (public or private) to review it
  • (step 2) For public metadata, it will then be sent to public metadata hub
  • (step 2) For private metadata, it will be sent to the organizations private metadata repository
• (step 3) Public metadata will be replicated from the public hub to all the public metadata servers, this insures that there is not a single point of failure based on metadata in the system. (note: an organization can do the same with internal private metadata)