<!DOCTYPE html><htmllang='en'><head><title>[spec.cats]</title><metacharset='UTF-8'/><linkrel='stylesheet'type='text/css'href='14882.css'/><linkrel='stylesheet'type='text/css'href='https://fonts.googleapis.com/css2?family=Noto+Serif'/><linkrel='stylesheet'type='text/css'href='https://fonts.googleapis.com/css2?family=Noto+Sans'/><linkrel='stylesheet'type='text/css'href='https://fonts.googleapis.com/css2?family=Noto+Sans+Mono'/><linkrel='icon'href='icon.png'/><linkrel='stylesheet'type='text/css'href='expanded.css'title='Normal'/><linkrel='alternate stylesheet'type='text/css'href='colored.css'title='Notes and examples colored'/><linkrel='alternate stylesheet'type='text/css'href='normative-only.css'title='Notes and examples hidden'/></head><body><divclass='wrapper'><h1><aclass='secnum'style='min-width:50pt'>4</a> Specification <aclass='abbr_ref'href='index.html#spec'>[spec]</a></h1><h2><aclass='secnum'style='min-width:65pt'>4.2</a> Categories <aclass='abbr_ref'>[spec.cats]</a></h2><divclass='para'id='1'><divclass='marginalizedparent'><aclass='marginalized'href='#1'>1</a></div><divclass='sourceLinkParent'><aclass='sourceLink'href='https://github.com/mpusz/mp-units6e06eddf205deaf6c2f2f63500c8c70ec220a99f/source/intro.tex#L96'>#</a></div><divclass='texpara'><divid='1.sentence-1'class='sentence'>Detailed specifications for each of the components in the library are in