<!DOCTYPE html><htmllang='en'><head><title>[dimless.qty]</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'>5</a> Quantities and units library <aclass='abbr_ref'href='index.html#quantities'>[quantities]</a></h1><h2><aclass='secnum'style='min-width:65pt'>5.4</a> Reference <aclass='abbr_ref'href='qty.ref.html#dimless.qty'>[qty.ref]</a></h2><h3><aclass='secnum'style='min-width:80pt'>5.4.3</a> Quantity specification <aclass='abbr_ref'href='qty.spec.html#dimless.qty'>[qty.spec]</a></h3><h4><aclass='secnum'style='min-width:95pt'>5.4.3.3</a> Types <aclass='abbr_ref'href='qty.spec.types.html#dimless.qty'>[qty.spec.types]</a></h4><h4><aclass='secnum'style='min-width:110pt'>5.4.3.3.3</a> Base quantity of dimension one <aclass='abbr_ref'>[dimless.qty]</a></h4><divclass='texpara'><spanid='lib:dimensionless'><divclass='marginalizedparent'><aclass='itemDeclLink'href='#lib:dimensionless'>🔗</a></div><spanclass='codeblock'><spanclass='keyword'>namespace</span> mp_units <spanclass='curlybracket'>{</span>
</span></span></div><divclass='para'id='1'><divclass='marginalizedparent'><aclass='marginalized'href='#1'>1</a></div><divclass='sourceLinkParent'><aclass='sourceLink'href='https://github.com/mpusz/mp-unitse9c5f7236ebfe1b287a5a4a49aaf57fbefa87233/source/quantities.tex#L1813'>#</a></div><divclass='texpara'><divid='1.sentence-1'class='sentence'><spanclass='texttt'>dimensionless</span> represents the base quantity of dimension one (<ahref="https://www.electropedia.org/iev/iev.nsf/display?openform&ievref=112-01-13">IEC 60050, 112-01-13</a>)<aclass='hidden_link'href='#1.sentence-1'>.</a></div></div></div></div></body></html>