<?xml version="1.0" encoding="UTF-8"?><placename>  <system>China Historical GIS, Harvard University and Fudan University</system>  <license>CC BY-NC 4.0</license>  <uri>https://chgis.hudci.org/tgaz/placename/hvd_70116</uri> <spellings>    <spelling>      <written-form script="traditional Chinese">渭源縣</written-form>      <exonym-lang></exonym-lang>      <attested-by></attested-by>      <note></note>    </spelling>    <spelling>      <written-form script="simplified Chinese">渭源县</written-form>      <exonym-lang></exonym-lang>      <attested-by></attested-by>      <note></note>    </spelling>    <spelling>      <transcription system="Pinyin">Weiyuan Xian</transcription>      <exonym-lang></exonym-lang>      <attested-by></attested-by>      <note></note>    </spelling>  </spellings>  <feature-type>    <name>县</name>    <alternate-name>縣</alternate-name>    <transcription>xian</transcription>    <translation lang="en">county</translation>  </feature-type>  <temporal>    <begin>551</begin>    <begin-rule>4</begin-rule>    <end>762</end>    <end-rule>4</end-rule>  </temporal>  <spatial>    <object-type>POINT</object-type>    <xy-type>point</xy-type>    <latitude-direction>N</latitude-direction>    <degrees-latitude>35.13949</degrees-latitude>    <longitude-direction>E</longitude-direction>    <degrees-longitude>104.21017</degrees-longitude>    <geo-source>FROM_AC</geo-source>    <present-location>    </present-location>  </spatial>  <historical-context>    <part-of-relationships>      <part-of parent-id="hvd_115904" from="551" to="555" >        <parent-name>渭源郡</parent-name>        <transcribed-name>Weiyuan Jun</transcribed-name>      </part-of>      <part-of parent-id="hvd_115585" from="556" to="582" >        <parent-name>陇西郡</parent-name>        <transcribed-name>Longxi Jun</transcribed-name>      </part-of>      <part-of parent-id="hvd_113285" from="583" to="606" >        <parent-name>渭州</parent-name>        <transcribed-name>Wei Zhou</transcribed-name>      </part-of>      <part-of parent-id="hvd_113285" from="607" to="741" >        <parent-name>渭州</parent-name>        <transcribed-name>Wei Zhou</transcribed-name>      </part-of>      <part-of parent-id="hvd_115585" from="742" to="757" >        <parent-name>陇西郡</parent-name>        <transcribed-name>Longxi Jun</transcribed-name>      </part-of>      <part-of parent-id="hvd_115905" from="758" to="762" >        <parent-name>渭州</parent-name>        <transcribed-name>Wei Zhou</transcribed-name>      </part-of>    </part-of-relationships>    <subordinate-units><br />
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        <transcribed-name></transcribed-name>      </subordinate-unit>    </subordinate-units>  </historical-context>  <data-source>CHGIS</data-source>  <source-note>    <![CDATA[      渭源县（551—762）
西魏大统十七年（551 年）改首阳县为渭源县，属渭源郡。不久废郡，仍属陇西郡。隋因之，
开皇三年（583 年），罢郡，属渭州①。唐初因之。天宝元年（742 年），属陇西郡。乾元元年
（758 年）复属渭州②。宝应元年（762 年）随州陷吐蕃，废③。治所在今甘肃渭源县。

①《元和郡县图志》卷39 渭源县条：“本汉首阳，属陇西郡。西魏文帝分陇西置渭源郡，因渭水为名也。隋开皇三年罢郡，县属渭州”，中华书局1983 年版，第983-984 页。
②《旧唐书》卷40《地理三》陇右道渭州条：“武德元年，置渭州。天宝元年，改为陇西郡。乾元元年，复为渭州。”中华书局1975 年版，第1632 页。
③《嘉庆重修一统志》卷252?兰州府?渭源县条：“西魏大统十七年改县曰渭源，又分置渭源郡，寻废。隋仍属陇西郡。唐属渭州，广德初随州陷吐蕃县，废。”（《四部丛刊续编》，商务印书馆，1934 年，2314 册）《新唐书》卷40《地理四》陇右道条：“宝应元年又陷秦、渭、洮、临”，中华书局1975 年版，第1040 页。《嘉庆重修一统志》说广德初废恐误。    ]]>  </source-note>  <source-uri>      </source-uri></placename>