The contextual menu of a 
XML Schema Repository node in the tree from the
Data Source Explorer view contains the following actions:
Refresh- Performs a refresh for the sub-tree of the selected node.
- Register
- Opens a dialog for adding a new schema file in the XML Schema repository. In this dialog
the following fields can be set:
- XML schema file - Location on your file system.
- XSR name - Schema name.
- Comment - Short comment (optional).
- Schema location - Primary schema name (optional).
Decomposition means that parts of the XML documents are stored in relational tables. Which parts map to which tables and columns are specified in the schema annotations. Schema dependencies management is done by using the Add and Remove buttons.
Schema
View