Have I an error in my POD?

I have a package in CPAN (MathML::Entities::Approximate) and when it is installed manually, it's fine.

However when it's installed via the CPAN module (perl -MCPAN -e shell...) there is an error about the ABSTRACT (I can't paste the exact message in, as I've installed the package on both my systems now <sad/>)

I *thought* that the abstract was deduced from the NAME line: the element after the hyphen.... however this appears not to be the case.

I have compared my POD to other packages, and it seams to be complete.

SO:
1) What is the abstract?
2) How do I define it on my package?

Many thanks...
--
Ian
.