使用XSLT添加/插入子元素

Question

我有以下情况:

我需要将子元素添加到现有的XML标记中.

我当前的XML看起来像这样,它包含一个空的(自闭)" <attr tag=.../>":

<?xml version="1.0" encoding="UTF-8"?>
<dataset>
...
<attr tag="00081110" vr="SQ" pos="-1" name="Referenced Study Sequence" len="-1"/>
...
</dataset>

在转换之后它应该看起来像这样,添加/插入2个子元素(由<item>元素包围):

<?xml version="1.0" encoding="UTF-8"?>
<dataset>
...
<attr tag="00081110" vr="SQ" pos="-1" name="Referenced Study Sequence" len="-1">
  <item id="1" pos="28" len="-1">
    <attr tag="00081150" vr="UI" pos="36" name="Referenced SOP Class UID" vm="0" len="3">991</attr>
    <attr tag="00081155" vr="UI" pos="44" name="Referenced SOP Instance UID" vm="0" len="3">992</attr>
  </item>
</attr>

...
</dataset>

我怎么能实现这个目标？我尝试了各种随机设置,但在我最好的镜头中,我最后用一个子元素替换父元素(tag ="00081110").

Answer 1

<xsl:template match="attr">
  <xsl:copy>
    <xsl:copy-of select="@*" />

    <item id="1" pos="28" len="-1">
      <attr tag="00081150" vr="UI" pos="36" name="Referenced SOP Class UID" vm="0" len="3">991</attr>
      <attr tag="00081155" vr="UI" pos="44" name="Referenced SOP Instance UID" vm="0" len="3">992</attr>
    </item>

  </xsl:copy>
</xsl:template>