<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>55</termId><termName>Block</termName><termType>PT</termType><termLanguage>en-EN</termLanguage><termVocabulary>SYMSITES</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Block</termSortkey><termNote label="Scope"><![CDATA[ <p>SYMSITES k-SDSS</p> ]]></termNote><termNote label="Definition"><![CDATA[ <p>A group of (presumably) homogeneous experimental units (a complete block contains all treatments).</p> ]]></termNote><termNote label="Definition"><![CDATA[ <p>A group of (presumably) homogeneous experimental units (a complete block contains all treatments).</p> ]]></termNote><termCreatedDate>Block</termCreatedDate><relation><relationType>BT</relationType><termId>56</termId><termName>Treatment design</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>53</termId><termName>Experimental unit</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>52</termId><termName>Treatment (k-SDSS)</termName><termType>PT</termType></relation></term>  </Zthes>