PeML Perl Macro Language: flexible text preprocessor providing full
access to the Perl language.
The preprocessor copies input to the output, while substituting Perl
code contained within special markers: "$<" and ">$".
The perl expressions are evaluated and substituted with their results
in the output.
It is possible to choose different markers using command line options
or by defining the variables $peml_open, $peml_close, using Perl.
peml OPTIONS* [--] [INPUT] >[OUTPUT]
-open open_rgx: Define opening regexp for substitution area.
-close close_rgx: Define closing regexp for substitution area.
-output output_file: Select output file.
Hello World $< 11*3 >$, today is $< `date` >$
Hello World 33, today is Wed Nov 2 01:22:52 CET 2011