context

    OpenVMS usage:context
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Value identifying the data stream that DCX$ANALYZE_DATA analyzes.
    The context argument is the address of a longword containing this
    value. DCX$ANALYZE_INIT initializes this value; you should not
    modify it. You can define multiple context arguments to identify
    multiple data streams that are processed simultaneously.

 record

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor
    Record to be analyzed. DCX$ANALYZE_DATA reads the record
    argument, which is the address of a descriptor for the record
    string. The maximum length of the record string is 65,535
    characters.