<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31308405</termId><termName>lines</termName><termType>PT</termType><termNote><![CDATA[ In mathematics, the trace of a moving point in continuous extent, either straight or curved, having length but without breadth or thickness. In geometry, the concept of a line can vary with the definition of geometry; for example in analytic geometry, a line is the set of points on a plane having coordinates that satisfy a given linear equation; in incidence geometry, a line may be an independent object distinct from the set of points which lie on it. ]]></termNote><termCreatedDate>2026-03-30 20:23:01</termCreatedDate><relation><relationType>UF</relationType><termId>31308406</termId><termName>line</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31299790</termId><termName>geometric concepts</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31301215</termId><termName>plimsoll lines</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31301227</termId><termName>isotherms</termName><termType>PT</termType></relation></term>  </Zthes>