on and the original PCRE before they appeared in Perl are available
using the Python syntax. There is also some support for one or two .NET and
Oniguruma syntax items, and there are options for requesting some minor changes
that give better ECMAScript (aka JavaScript) compatibility.
</P>
<P>
The source code for PCRE2 can be compiled to support strings of 8-bit, 16-bit,
or 32-bit code units, which means that up to three separate libraries may be
installed, one for each code unit size. The size of code unit i