Specs for pracjourn.dtx.

1. Define an \articleID macro which typesets the article identification in a block
somewhere on the first page of the article, and which can be used to identify the
article/revision date for reader comments.  E.g. if this appears in the article source
file:

 \articleID{Smith J, My TeX Idea, TPJ Vol 1 No 1, 2005-1-15; revised 2005-2-12}

it will become a block of text typeset on the first page of the article.   See e.g.
http://www.ams.org/bull/2004-41-04/S0273-0979-04-01032-8/S0273-0979-04-01032-8.pdf

2.  Write the information from the argument of the \articleID macro into a file.  Call
the file _id.tex.  Put this file in the same directory as the source file, and overwrite
any previous files of the same name.

3.  Define a \copyright macro which will print a copyright notice at the bottom of the
first page.  E.g. "\copyright{copyright TeX Users Group 2005}" will produce "copyright
TeX Users Group 2005" at the bottom of the first page.

4. Use the page measures from the current versions of the style files at
http://www.tug.org/pracjourn/dtx/.  These page measures should work with both Letter and
A4 paper sizes.