civil procedure code 1908

Rule 5 Order XVI of Code of Civil Procedure 1908 "Time, place and purpose of attendance to be specified in summons"

Every summons for the attendance of a person to give evidence or to produce a document shall specify the time and place at which he is required to attend, and also whether his attendance is required for the purpose of giving evidence or to produce a document, or for both purposes; and any particular document, which the person summoned is called on to produce, shall be described in the summons with reasonable accuracy.

What are the facts?  What is the issue?