XML Extensions statements are grouped into the following categories:
Document Processing Statements. These statements are used to process, manipulate, or validate XML documents.
Document Management Statements. These statements are used to copy an XML document from an external file to an internal text string and vice versa.
Directory Management Statements. These statements are useful when implementing directory-polling schemes.
State Management Statements. These statements are used to control the state or condition of XML Extensions statements .
Note: Each statement contains zero or more positional parameters. These parameters are used to specify such items as the source
or destination data item, source or destination XML document, and flags. In some statements, trailing positional parameters
are optional and may be omitted, as specified in the statement descriptions below.