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.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
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.\" ========================================================================
.\"
.IX Title "Business::BR::PIS 3pm"
.TH Business::BR::PIS 3pm "2022-10-13" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Business::BR::PIS \- Perl module to test for correct PIS numbers
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Business::BR::PIS; 
\&
\&  print "ok " if test_pis(\*(Aq121.51144.13\-7\*(Aq); # prints \*(Aqok \*(Aq
\&  print "bad " unless test_pis(\*(Aq121.51144.13\-0\*(Aq); # prints \*(Aqbad \*(Aq
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module handles \s-1PIS\s0 numbers, testing, formatting, etc.
.SS "\s-1EXPORT\s0"
.IX Subsection "EXPORT"
\&\f(CW\*(C`test_pis\*(C'\fR is exported by default. \f(CW\*(C`canon_pis\*(C'\fR, \f(CW\*(C`format_pis\*(C'\fR,
\&\f(CW\*(C`parse_pis\*(C'\fR and \f(CW\*(C`random_pis\*(C'\fR can be exported on demand.
.SH "THE CHECK EQUATIONS"
.IX Header "THE CHECK EQUATIONS"
A correct \s-1PIS\s0 number has a check digit which is computed
from the base 10 first digits. Consider the \s-1PIS\s0 number 
written as 11 digits
.PP
.Vb 1
\&  c[1] c[2] c[3] c[4] c[5] c[6] c[7] c[8] c[9] c[10] dv[1]
.Ve
.PP
To check whether a \s-1PIS\s0 is correct or not, it has to satisfy 
the check equation:
.PP
.Vb 3
\&  c[1]*3+c[2]*2+c[3]*9+c[4]*8+c[5]*7+
\&          c[6]*6+c[7]*5+c[8]*4+c[9]*3+c[10]*2+dv[1] = 0 (mod 11) or
\&                                                   = 1 (mod 11) (if dv[1]=0)
.Ve
.SH "BUGS"
.IX Header "BUGS"
Absolute lack of documentation by now.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Please reports bugs via \s-1CPAN RT,\s0 
http://rt.cpan.org/NoAuth/Bugs.html?Dist=Business\-BR\-Ids
By doing so, the author will receive your reports and patches, 
as well as the problem and solutions will be documented.
.SH "AUTHOR"
.IX Header "AUTHOR"
A. R. Ferreira, <ferreira@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright (C) 2005 by A. R. Ferreira
.PP
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.6 or,
at your option, any later version of Perl 5 you may have available.