EMAILDIST-README

I have modified the grammar for idts (sequences of identifiers with optional
type annotations). idts are generally used as in abstractions, be it
lambda-abstraction or quantifiers. It now has roughly the form

idts = pttrn*
pttrn = idt

where pttrn is a new nonterminal (type) not used anywhere else.
This means that the Pure syntax for idts is in fact unchanged.
The point is that the new nontermianl pttrn allows later extensions of this
syntax. (See, for example, HOL/Prod.thy).

The name idts is not quite accurate any longer and may become downright
confusing once pttrn has been extended. Something should be done about this,
in particular wrt to the manual.

ISABELLE -- INSTRUCTIONS FOR UNPACKING THE EMAIL DISTRIBUTION 

The Isabelle email distribution consists of about 8 installments, each
small enough to send by electronic mail.  The files are called Isabelle.aa,
Isabelle.ab, ....  They have been generated by tar, compress, uuencode, and
split, and are packed for email using shar.  To unpack the files, perform
the following steps:

STEP 1.  Create a new directory to hold Isabelle and move to that
directory (the name of the directory does not matter):

	mkdir Isabelle;  cd Isabelle

STEP 2.  Put each message into a separate file and pipe it through unshar.
(If you don't have unshar, remove the header lines generated by the mail
system and submit the file to sh.)

STEP 3.  Concatenate the files into one file using the command

	cat Isabelle.?? > 92.tar.Z.uu

STEP 4.  Undo the uuencode operation using the command

	uudecode 92.tar.Z.uu

STEP 5.  You should now have a file 92.tar.Z; uncompress and unpack it using...

   	uncompress -c 92.tar.Z | tar xf -

STEP 6.  You should now have a complete Isabelle directory, called 92.  You
may now tidy up by executing

	rm Isabelle.?? *.hdr 92.tar.Z.uu 92.tar.Z

Consult the file 92/README for information on compiling Isabelle.

						Good luck!