Making some queries required

[OscarRoonie]

I've been working on some xsl files and they are doing what I want. I had planned on securing the files with a processing instruction but I just read on this forum that I cannot do what I had planned --- using the client user name in the static query.

So I have found that my pages are easily spoofed by cutting out part of the query in the URL.

Is there a way to make certain fields required in an xsl file? In other words, if my query contained &client_id=7012..., is there a way to stipulate in my xsl file that the client_id field HAS to be queried and answered?

If not, can someone point me in the correct direction? I am new to XML and do not understand the answer to this post:

http://fmforums.com/forum/showtopic.php?tid/182893/

thank you