使用XSLT将固定长度文本转换为自定义结构XML的实现问题求助

Let's work through this together! Your current XSLT has a couple of key issues that are stopping it from producing the XML you need, plus it doesn't handle the substring extraction required for your fixed-length input text. Here's a breakdown of what went wrong and how to fix it:

What's Wrong With Your Current XSLT? #

• You're using <xs:element> (an XML Schema element) instead of <xsl:element> (the XSLT tag for generating output nodes). These are completely different—<xs:element> is for defining schema structures, not building your output XML.
• Your template is named main, but there's no logic to trigger it (like a root-matching template that calls it).
• There's no code to process your input text at all; you're just hardcoding a static value instead of extracting substrings.

Corrected XSLT Code #

This code handles both scenarios: if your input is wrapped in an XML element, or if you're working directly with the plain text string. It uses fixed-position substring extraction to map your input to the desired XML structure:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes"/> <!-- Indent for readability -->

  <!-- Scenario 1: Input is an XML element (e.g., <input>abc01223jan20212605 mytext</input>) -->
  <xsl:template match="/input">
    <bookings>
      <!-- Extract first 3 characters for <name> -->
      <name><xsl:value-of select="substring(., 1, 3)"/></name>
      <!-- Extract characters 4-6, replace '0' with 'o' to match your example's <uid>o12</uid> -->
      <uid><xsl:value-of select="replace(substring(., 4, 3), '0', 'o')"/></uid>
      <!-- Extract 9 characters starting at position 7 for <date> -->
      <date><xsl:value-of select="substring(., 7, 9)"/></date>
      <!-- Extract 4 characters starting at position 16 for <seq> -->
      <seq><xsl:value-of select="substring(., 16, 4)"/></seq>
      <!-- Grab everything after the space for <comment> -->
      <comment><xsl:value-of select="substring-after(., ' ')"/></comment>
    </bookings>
  </xsl:template>

  <!-- Scenario 2: Input is plain text (uses XSLT 3.0's initial template) -->
  <xsl:template name="xsl:initial-template">
    <xsl:variable name="input-text" select="'abc01223jan20212605 mytext'"/>
    <bookings>
      <name><xsl:value-of select="substring($input-text, 1, 3)"/></name>
      <uid><xsl:value-of select="replace(substring($input-text, 4, 3), '0', 'o')"/></uid>
      <date><xsl:value-of select="substring($input-text, 7, 9)"/></date>
      <seq><xsl:value-of select="substring($input-text, 16, 4)"/></seq>
      <comment><xsl:value-of select="substring-after($input-text, ' ')"/></comment>
    </bookings>
  </xsl:template>
</xsl:stylesheet>

How This Works #

Let's break down the substring logic to match your input abc01223jan20212605 mytext:

• <name>: Takes the first 3 characters (abc)
• <uid>: Takes characters 4-6 (012) and replaces the leading 0 with o to match your example output (o12)—remove the replace() call if you just want the raw 012
• <date>: Takes 9 characters starting at position 7 (23jan2021)
• <seq>: Takes 4 characters starting at position 16 (2605)
• <comment>: Uses substring-after() to capture everything after the space in your input (mytext)

Also note: I fixed the inconsistent tag casing in your target XML (you had <Date> opening and </date> closing)—XML is case-sensitive, so this ensures your output is valid.

How to Run It #

• For XML input: Wrap your text in an <input> element and run the XSLT against that XML file.
• For plain text: Use an XSLT 3.0 processor (like Saxon) which will automatically execute the xsl:initial-template and generate the output.

内容的提问来源于stack exchange，提问作者user1481980