Library /sys$common/syshlp/tracehlp.hlb ANALYZE, /SELECT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    /NOSELECT
    /SELECT=(protocol-identifier)

    The /SELECT qualifier allows you to specify which of  the  protocol
    headers you want to appear in the output.

    The default is to format and display all the protocol headers

  Additional Information (explode) :

• protocol-identifier