types of pdf files

how to create different types and what are the basic differences

[sreehemanth]

i need to know the basic differences in the types of pdf files.. i know that there are pdf x1a, pdf x2, pdf x3 type of files.. but i need to understand as to why they are three and what are their purposes.... stuff like that....

[coopster]

Welcome to WebmasterWorld, sreehemanth.

Have you checked out Adobe's FAQ?

[adobe.com...]

[tjhorne]

Adobe's site sux if your looking for support and answers try this:

[planetpdf.com...]

Todd H.