parsing existing exports: I just want to convert on topic w/in my WP corpus

[paulbeard]

Is your feature request related to a problem? Please describe the problem you're trying to solve.

I want to convert one topic/section of my WP corpus to text to reuse elsewhere. I don't want the whole thing converted. I

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like

Ideally, a command line version that can be run against the XML file that I get from WP. I can pull the subset of content I want and point the tool at that. I don't want the whole thing. Or if the _posts was also broken out by category as assigned in WP, I could live with that.

Describe alternatives you've considered

Search and replace? Nah

Additional context

Add any other context or screenshots about the feature request here.