Xml 使用键和变量的xslt_Xml_Xslt_Xslt 1.0_Marc

Xml 使用键和变量的xslt

xml xslt

Xml 使用键和变量的xslt,xml,xslt,xslt-1.0,marc,Xml,Xslt,Xslt 1.0,Marc,嗨，所有这些问题都与此相关：但这次我有一个工作的xslt <record> <leader>01877nz a2200433o 4500</leader> <controlfield tag="001">1</controlfield> ... (more controlfields tag 002 to 010) <datafield tag="013" ind1=" " ind2=" ">

嗨，所有这些问题都与此相关：但这次我有一个工作的xslt

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

我目前正在研究以下xml：

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>


01877nz a2200433o 4500
1.
... （更多控制字段标签002至010）
福梅尔奇
... （更多数据域标记，数据域标记从011到999）
婆罗洲
... （更多数据域标记，数据域标记从011到999）
G
东南亚
c_7260
... （更多数据域标记，数据域标记从011到999）
... （更多记录）
... （更多记录字段）
... （更多记录字段）
02462nz a2200553o 4500
2.
... （更多控制字段标签002至010）
福梅尔奇
c_7260
... （更多数据域标记，数据域标记从011到999）
东南亚
... （更多数据域标记，数据域标记从011到999）

我有以下xslt：

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

<?xml version="1.0" encoding="UTF-8"?>
 <xsl:stylesheet version="1.0" xmlns:marc="http://www.loc.gov/MARC21/slim"    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"    xmlns:dc="http://purl.org/dc/elements/1.1/"   xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="marc">
 <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
 <xsl:key name="term" match="//datafield[@tag='151'][subfield[@code='a']]" use="." />

 <xsl:template match="//datafield[@tag='151'][subfield[@code='a']]">
  <xsl:variable name="t550a" select="//datafield[@tag='550'][subfield[@code='a']]" />
  <xsl:for-each select="key('term','$550a')">
   <xsl:value-of select="//controlfield[@tag='001']" />
  </xsl:for-each>
 </xsl:template>

 <xsl:template match="@*|node()">
  <xsl:copy>
   <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
 </xsl:template>    

</xsl:stylesheet>

有了这个，我创建了一个包含所有151个键（term）的索引。我还创建了一个变量“t550a”。通过键功能，我将550a标记（datafield tag=“550”subfield code=“a”）与术语键匹配。然后获取该键的controlfield标记001的值。我还希望获得xml的所有节点，即“xsl:copy”。使用我使用的xslt，数据字段标记151似乎正在被删除

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

我想在550领域取得以下成就：

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

        ... (other fields omitted)
<datafield tag="550" ind1=" " ind2=" ">
 <subfield code="w">g</subfield>
 <subfield code="a">South East Asia</subfield>
 <subfield code="c">c_7260</subfield>
 <subfield code="0">2</subfield>
</datafield>
          ... (other fields omitted)

<datafield tag="550" ind1=" " ind2=" ">
 <subfield code="w">h</subfield>
 <subfield code="a">Borneo</subfield>
 <subfield code="c">c_1017</subfield>
 <subfield code="0">1</subfield>
</datafield>

。。。（省略其他字段）
G
东南亚
c_7260
2.
... （省略其他字段）
H
婆罗洲
c_1017
1.

因此，550东南亚子场a将具有附加的值为2的子场0，其基于151东南亚子场a的控制场001。此外，550子字段a婆罗洲将具有附加的值为1的子字段0，该值基于151子字段a婆罗洲的控制字段001

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

有人能引导我正确地做这件事吗。谢谢

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

使用我使用的xslt，数据字段标记151似乎正在被删除

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

是的，这是正确的，因为这是您指示它执行的操作：

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

 <xsl:template match="//datafield[@tag='151'][subfield[@code='a']]">
  <xsl:variable name="t550a" select="//datafield[@tag='550'][subfield[@code='a']]" />
  <xsl:for-each select="key('term','$550a')">
   <xsl:value-of select="//controlfield[@tag='001']" />
  </xsl:for-each>
 </xsl:template>

这将复制

数据字段

我认为您的模板与错误的元素匹配。如果希望在“550”字段中添加子节点，则应该有一个与之匹配的模板

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

<xsl:template match="datafield[@tag='550'][subfield[@code='a']]">

下一个问题是

tt50a

变量的定义。您确实希望在这里使用相对表达式，因为此时它将拾取文档中任何位置的第一个匹配元素。您应该改为这样做（这是有效的，因为您现在位于

节点上）

 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

最后，在

xsl:for-each

中，您执行

//controlfield[@tag='001']]

操作，然后选择文档中的第一个

控制字段。我想您只想选择当前记录中的一个。由于记录
是当前数据字段
的父项，您可以执行以下操作：
 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

<xsl:value-of select="../controlfield[@tag='001']" />



试试这个XSLT
 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

<xsl:stylesheet version="1.0" xmlns:marc="http://www.loc.gov/MARC21/slim" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:dc="http://purl.org/dc/elements/1.1/"   xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="rdf dc marc">
 <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
 <xsl:key name="term" match="datafield[@tag='151']" use="subfield[@code='a']" />

 <xsl:template match="datafield[@tag='550'][subfield[@code='a']]">
   <xsl:variable name="t550a" select="subfield[@code='a']" />
   <xsl:copy>
     <xsl:apply-templates select="@*|node()"/>
     <xsl:for-each select="key('term',$t550a)">
       <subfield code="0">
         <xsl:value-of select="../controlfield[@tag='001']" />
       </subfield>
      </xsl:for-each>
    </xsl:copy>
 </xsl:template>

 <xsl:template match="@*|node()">
  <xsl:copy>
   <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
 </xsl:template>    
</xsl:stylesheet>



这不会给出您在问题中显示的确切输出，因为您的输入XML只有一个550
节点。谢谢Abel！我尝试了你的修正模板，但似乎我仍然得到相同的。我在所有节点的副本后添加：@schnydszch如果您添加了整个匹配模板，您应该会收到一个错误。我的意思是用上面的代码更新现有的模板。我想您更愿意使用当前节点的controlfield，如//controlfield。。。。我想从匹配550值的键中获取controlfield 001。因此，550东南亚子场a将具有附加的值为2的子场0，其基于151东南亚子场a的控制场001。还有550子字段a婆罗洲将有额外的值为1的子字段0，这是基于151子字段a婆罗洲的控制字段001。哇！这是很好的提姆C，它节省了我的时间试图找出我的人行横道。我使用键和变量是正确的，但我还不知道如何正确执行它。也谢谢亚伯。：）
 <record>
  <leader>01877nz  a2200433o  4500</leader>
  <controlfield tag="001">1</controlfield>
        ... (more controlfields tag 002 to 010)
  <datafield tag="013" ind1=" " ind2=" ">
   <subfield code="a">formerge</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="150" ind1=" " ind2=" ">
   <subfield code="a">Borneo</subfield>
  </datafield>
          ... (more datafield tags, datafield tags are from 011 to 999)
  <datafield tag="550" ind1=" " ind2=" ">
   <subfield code="w">g</subfield>
   <subfield code="a">South East Asia</subfield>
   <subfield code="c">c_7260</subfield>
  </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>

       ... (more records)

  <record>
       ... (more records fields)
       ... (more records fields)
  </record>

  <record>
   <leader>02462nz  a2200553o  4500</leader>
   <controlfield tag="001">2</controlfield>
         ... (more controlfields tag 002 to 010)
   <datafield tag="013" ind1=" " ind2=" ">
    <subfield code="a">formerge</subfield>
   </datafield>
   <datafield tag="035" ind1=" " ind2=" ">
    <subfield code="a">c_7260</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
   <datafield tag="151" ind1=" " ind2=" ">
    <subfield code="a">South East Asia</subfield>
   </datafield>
       ... (more datafield tags, datafield tags are from 011 to 999)
  </record>