parseTags: Parse locus tags
In cstubben/pmcXML: Tools to parse full text XML documents from PMC Open Access

Parse locus tags from text and tables and expand tag pairs marking the start and end of a region

1	parseTags(y, tags, prefix, suffix, notStartingWith, expand = TRUE, digits = 4)

`y`	output from `searchPMC`
`tags`	an ordered list of locus tags, used for expanding locus tag pairs
`prefix`	locus tag prefix, can be a regular expression such as "BPS[SL]" or "VCA?"
`suffix`	locus tag suffix, should be a single letter "a" or character class "[ac]" or grouping brackets "(a\|c\|\.1)"
`notStartingWith`	optional single letter to exclude matches, eg, use "J" to match "HP" but not "JHP" tags in Helicobacter
`expand`	expand locus tags pairs marking the start and end of a operon, island or other region
`digits`	number of digits in locus tags, use NA for 1 or more