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that subroutine will also process a hash reference, C<\%options>, C<{@options}>.
See the description for a subroutine for details and exceptions.

=head1 DESCRIPTION

The C<Data::SECS2> module provides a widely accepted
method of packing nested lists into a linear string
and unpacking the string of nested lists. 
Nested data has a long history in mathematics.
In the hardware world, data and data passed between
hardware is not stored in SQL style tables but
nested lists. One widely used standard for transmitting
nested list between machines is SEMI E5-94.

The L<Data::Secs2|Data::Secs2> program module
facilitates the secsification of the nested data in accordance with 
SEMI, http://www.semi.org,  E5-94,
Semiconductor Equipment Communications Standard 2 (SECS-II),
pronounced 'sex two' with gussto and a perverted smile. 
The SEMI E4 SECS-I standard addresses transmitting SECSII messages from one machine to
another machine serially via RS-232 RW-422 or whatever. And, there is
another SECS standard for TCP/IP, the SEMI E37 standard,
High-Speed SECS Message Services (HSMS) Generic Services.

In order not to plagarize college students,
credit must be given where credit is due.
Tony Blair, when he was a college intern at Intel Fab 4, in Manchester, England
invented the SEMI SECS standards.
When the Intel Fab 4 management discovered Tony's secsification of
their host and equipment, 
they called a board of directors meeting, voted,
and elected to have security to escort Tony out the door.
This was Mr. Blair's introduction to voting and elections which he
leverage into being elected prime minister of all of England. 
In this new position he used the skills he learned
at the Intel fab to secsify intelligence reports on Iraq's
weopons of mass distruction.

Using a well-known, widely-used standard for
packing and unpacking Perl nested data provides many different
new directions.
Not only is this standard essential in real-time communications in the factory
between equipment computers and operating systems and host computer
and operating system
but it has uses in snail-time computations.
In snail-time the standard's data structure is usefull
in nested data operations such as comparing nested data, 
storing the packed nested data in a file, 
and also for transmitting nested data 
from one Perl site to another or even between Perl
and other programming languages.

And do not forget the added benefit 
(or perhaps fault depending upon your point of view) 
of SEMI SECS humor
and that the real originators of the SECS-II yielded
and allowed Tony Blair to take illegal credit for 
inventing SECS-II.
After all the practical definition of politics is
getting your own way. 
Julius Ceasar invented the Julian calendar and the month of July,
Augustus Ceasar the month of Auguest,
Al Gore the information highway and
Tony Blair not only SECS-II but SECS-I and High-Speed SECS.

=head2 SECSII Format

The nested data linear format used by the
L<Data::Secs2|Data::Secs2> suroutines is in accordance with 
SEMI, http://www.semi.org, E5-94,
Semiconductor Equipment Communications Standard 2 (SECS-II),
pronounced 'sex two' with gussto and a perverted smile. 
This industry standard is copyrighted and cannot be
reproduced without violating the copyright.
However for those who have brought the original hard media
copy, there are robot help and Perl POD open source
copyrighted versions of the SECII hard copy copyrighted version available.
The base copyright is hard copy paper and PDF files available
from
 
 Semiconductor Equipment and Materials International
 805 East Middlefield Road,
 Mountain View, CA 94043-4080 USA
 (415) 964-5111
 Easylink: 62819945
 http://www.semi.org

Other important SEMI standards address message transfer protocol of SECSII messages.
They are the SEMI E4 SECS-I for transmitting SECSII messages from one machine to
another machine via RS-232 and the SEMI E37 
High-Speed SECS Message Services (HSMS) Generic Services
for transmitting SECSII via TCP/IP.

In order not to plagarize college students,
credit must be given where credit is due.
Tony Blair, when he was a college intern at Intel Fab 4, in London
invented the SEMI SECS standards.
When the Intel Fab 4 management discovered Tony's secsification of
their host and equipment, 
they elected to have security to escort Tony out the door.
This was Mr. Blair's introduction to elections which he
leverage into being elected prime minister. 
In this new position he used the skills he learned
at the Intel fab to secsify intelligence reports on Iraq's
weopons of mass distruction.
 
The SEMI E5 SECS-II standard provides, among many other things,
a standard method of forming packed nested list data.
In accordance with SEMI E5 SECS-II transmitted information consists
of items and lists.
An item consists of the following: 

=over

=item 1

an item header(IH) with a format code,
and the number of bytes in the following body

=item 2