Description:

Martel uses a modified form of the Perl regular expression language to
describe the format of a file. The definition is used to generate a
parser for that format. An input file is converted into a parse tree,
which is traversed in prefix order to generate SAX 2.0 events, as used
in XML processing. Element names and attributes are specified in the
regular expression grammar using the named group extension popularized
by Python.

The events can be used by any SAX handler. Some of the common handlers
can: build a DOM tree or any other data structures, load an XML database,
identify specific data fields (accession number, sequence, cross
reference), find the record start and end positions, and drive an XSL
transformation.