The XMT-O Schema tab allows you to specify the directory
location and filename of the XMT-O schema file. It also allows
you to enter the schema file namespace.
The schema file uses markup declarations to describe information
about the logical and physical structure of the class of documents
created with the tool. For example, markup declarations are included
that define the types of elements allowed in the document, as
well as their content models, and the attributes that may be assigned
to each element.
