Non standard enzymes in mzIdentML

[lutzfischer]

Currently xiFDR can only export a single standard predefined enzymes to mzIdentML. If something else is used (e.g. multiple enzymes) xiFDR will just offer to pick a standard enzyme from a given list.

It should parse the xisearch rules and translate these into the mzIdentML required regular expression or parse multistep digest and find the corresponding enzymes.

[lutzfischer]

it currently checks the name and then matches that against defined mzIdentML enzymes. If it finds one this will be picked. If the name contains a + it will also try to match against several enzymes.

direct translation of the specificity is still missing