我正在尝试验证在XML消息中重复的日期格式。当我在模板中只有一个日期时，我得到了同样的“空字符串”错误。我能够让这个模板起作用。但是当我添加一个“for-each”构造来解释可能在XML消息中重复的日期时，我得到错误“不允许空序列作为xsl：analyze-string的@select属性”。除了我不明白为什么我只是通过添加“for-each”而得到这个错误的事实，我不确定为什么验证代码认为有一个空序列。虽然可能缺少日期（我认为我第一次修复了，当不使用for-each构造时），我的测试消息确实有我试图测试的日期。我在网站上阅读了其他一些答案，但要么我不明白如何应用修复程序，要么我不知道建议的修复程序是否能解决我的问题（我不是程序员）。
有人可以帮我修复此代码，以便我可以测试这个重复的日期吗？
消息的结构是
<VXU_V04.ORDER> One or more may be present, not a required group; I’m calling this “OrderGroup”
<RXA> Required; only one RXA Segment per OrderGroup allowed
<RXA.3> Required; only one RXA.3 field per RXA Segment allowed
<TS.1> is a sub-components of RXA.3
以下是示例消息的相关部分
<VXU_V04.ORDER>
<ORC>
<ORC.1>RE</ORC.1>
<ORC.3>
<EI.1>197023</EI.1>
<EI.2>DCS</EI.2>
</ORC.3>
<ORC.10>
<XCN.2>
<FN.1>Clerk</FN.1>
</XCN.2>
<XCN.3>Myron</XCN.3>
</ORC.10>
<ORC.17>
<CE.1>DCS</CE.1>
<CE.2>Dabig Clinical System</CE.2>
<CE.3>StateIIS</CE.3>
</ORC.17>
</ORC>
<RXA>
<RXA.1>0</RXA.1>
<RXA.2>1</RXA.2>
<RXA.3>
<TS.1>20090415132511</TS.1>
</RXA.3>
<RXA.4>
<TS.1>20090415132511</TS.1>
</RXA.4>
<RXA.5>
<CE.1>31</CE.1>
<CE.2>Hep B Peds NOS</CE.2>
<CE.3>CVX</CE.3>
</RXA.5>
<RXA.6>999</RXA.6>
<RXA.9>
<CE.1>01</CE.1>
<CE.2>historical record</CE.2>
<CE.3>NIP0001</CE.3>
</RXA.9>
</RXA>
</VXU_V04.ORDER>
<VXU_V04.ORDER>
<ORC>
<ORC.1>RE</ORC.1>
<ORC.3>
<EI.1>197027</EI.1>
<EI.2>DCS</EI.2>
</ORC.3>
<ORC.10>
<XCN.2>
<FN.1>Clerk</FN.1>
</XCN.2>
<XCN.3>Myron</XCN.3>
</ORC.10>
<ORC.12>
<XCN.2>
<FN.1>Pediatric</FN.1>
</XCN.2>
<XCN.3>MARY</XCN.3>
<XCN.10>L</XCN.10>
<XCN.21>MD</XCN.21>
</ORC.12>
</ORC>
<RXA>
<RXA.1>0</RXA.1>
<RXA.2>1</RXA.2>
<RXA.3>
<TS.1>20090531132511</TS.1>
</RXA.3>
<RXA.4>
<TS.1>20090531132511</TS.1>
</RXA.4>
<RXA.5>
<CE.1>48</CE.1>
<CE.2>HIB PRP-T</CE.2>
<CE.3>CVX</CE.3>
</RXA.5>
<RXA.6>999</RXA.6>
<RXA.9>
<CE.1>00</CE.1>
<CE.2>new Immunization record</CE.2>
<CE.3>NIP0001</CE.3>
</RXA.9>
<RXA.10>
<XCN.2>
<FN.1>Sticker</FN.1>
</XCN.2>
<XCN.3>Nurse</XCN.3>
</RXA.10>
<RXA.11>
<LA2.4>
<HD.1>DCS_DC</HD.1>
</LA2.4>
</RXA.11>
<RXA.15>33k2a</RXA.15>
<RXA.17>
<CE.1>PMC</CE.1>
<CE.2>sanofi</CE.2>
<CE.3>MVX</CE.3>
</RXA.17>
</RXA>
<RXR>
<RXR.1>
<CE.1>C28161</CE.1>
<CE.2>IM</CE.2>
<CE.3>NCIT</CE.3>
<CE.4>IM</CE.4>
<CE.5>IM</CE.5>
<CE.6>HL70162</CE.6>
</RXR.1>
</RXR>
</VXU_V04.ORDER>
<VXU_V04.ORDER>
<ORC>
<ORC.1>RE</ORC.1>
<ORC.3>
<EI.1>197028</EI.1>
<EI.2>DCS</EI.2>
</ORC.3>
<ORC.10>
<XCN.2>
<FN.1>Clerk</FN.1>
</XCN.2>
<XCN.3>Myron</XCN.3>
</ORC.10>
<ORC.12>
<XCN.2>
<FN.1>Pediatric</FN.1>
</XCN.2>
<XCN.3>MARY</XCN.3>
<XCN.10>L</XCN.10>
<XCN.21>MD</XCN.21>
</ORC.12>
</ORC>
<RXA>
<RXA.1>0</RXA.1>
<RXA.2>1</RXA.2>
<RXA.3>
<TS.1>20090531132511</TS.1>
</RXA.3>
<RXA.4>
<TS.1>20090531132511</TS.1>
</RXA.4>
<RXA.5>
<CE.1>110</CE.1>
<CE.2>DTAP-Hep B-IPV</CE.2>
<CE.3>CVX</CE.3>
</RXA.5>
<RXA.6>999</RXA.6>
<RXA.9>
<CE.1>00</CE.1>
<CE.2>new immunization record</CE.2>
<CE.3>NIP0001</CE.3>
</RXA.9>
<RXA.10>
<XCN.2>
<FN.1>Sticker</FN.1>
</XCN.2>
<XCN.3>Nurse</XCN.3>
</RXA.10>
<RXA.11>
<LA2.4>
<HD.1>DCS_DC</HD.1>
</LA2.4>
</RXA.11>
<RXA.15>xy3939</RXA.15>
<RXA.17>
<CE.1>SKB</CE.1>
<CE.2>GSK</CE.2>
<CE.3>MVX</CE.3>
</RXA.17>
</RXA>
<RXR>
<RXR.1>
<CE.1>IM</CE.1>
<CE.2>IM</CE.2>
<CE.3>HL70162</CE.3>
<CE.4>C28161</CE.4>
<CE.5>IM</CE.5>
<CE.6>NCIT</CE.6>
</RXR.1>
</RXR>
</VXU_V04.ORDER>
这是我的验证模板。我尝试了一些不同的东西，比如在每个“analyze-string”函数之前使用“for-each”语句。我尝试在TS1Field上添加一个计数，但是当我尝试将计数检查合并到这里时，我一直收到语法错误：。
我认为这可能是我遇到的类似问题，模板无法识别我的子组件（TS1Field）。我在这个网站上发布了一个关于它的问题，得到了一个很好的答案，修复了另一个验证模板中的另一个问但是，当我在这里尝试相同的事情时，它不起作用。
（顺便说一句，我知道我在这里有一个不同领域的描述 - 患者死亡日期 - 但这是来自我用作此基础的模板。我还没有到处更新这些消息。）
<xsl:stylesheet version="2.0" xmlns:a="urn:hl7-org:v2xml" xmlns:dil="http://www.aegis.net/msg/filter/jaxb/rule" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<!--
Must be VALUED AND
Must not repeat
-->
<xsl:variable name="OrderGroup" select="/a:VXU_V04/a:VXU_V04.ORDER"/>
<xsl:variable name="RXASegment" select="/a:VXU_V04/a:VXU_V04.ORDER/a:RXA"/>
<xsl:variable name="RXA3Field" select="/a:VXU_V04/a:VXU_V04.ORDER/a:RXA/a:RXA.3"/>
<xsl:variable name="TS1Field" select="/a:VXU_V04/a:VXU_V04.ORDER/a:RXA/a:TS.1"/>
<xsl:template match="/">
<dil:filterruleresult>
<xsl:choose>
<xsl:when test= "count($OrderGroup)= 0">
<dil:message type="info">VXU Order Group not found.</dil:message>
</xsl:when>
</xsl:choose>
<xsl:for-each select="$OrderGroup">
<xsl:choose>
<xsl:when test="count(a:RXA)= 0">
<dil:message type="error">When Order Group present, RXA Segment is required.</dil:message>
</xsl:when>
<xsl:when test="count(a:RXA)> 1">
<dil:message type="error">Only one Pharmacy/Treatment Administration Segment (RXA) allowed per Order Group.</dil:message>
</xsl:when>
<xsl:otherwise>
<xsl:for-each select="a:RXA">
<xsl:choose>
<xsl:when test="count(a:RXA.3)= 0">
<dil:message type="error">RXA-3 Date/Time Start of Administration not found but is required.</dil:message>
</xsl:when>
<xsl:when test="count(a:RXA.3)> 1">
<dil:message type="error">Only one Date/Time Start of Administration (RXA-3) allowed per Order Segment.</dil:message>
</xsl:when>
<xsl:when test="count(a:RXA.3)= 1">
<dil:message type="info">Valid value of '<xsl:value-of select="./a:RXA.3"/>' found for Administered Amount (RXA-6).</dil:message>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:analyze-string regex="(["|'])(.*?)\1" select="$TS1Field">
<xsl:matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) '<xsl:value-of select="$TS1Field"/>' found in message, but contains invalid apostrophes or quotes within the value text.</dil:message>
</xsl:matching-substring>
<xsl:non-matching-substring>
<dil:message type="info">Patient Death Date and Time (PID-29) '<xsl:value-of select="$TS1Field"/>' found in message. If any validation errors are found, they will follow this message. </dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,1,4) !=''">
<xsl:analyze-string regex="^(19|20)\d{{2}}$" select="substring($TS1Field,1,4)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for year not a valid year as required. Valid years have century of 19 or 20. Found value '<xsl:value-of select="substring($TS1Field,1,4)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,5,2) !=''">
<xsl:analyze-string regex="0[1-9]|1[0-2]" select="substring($TS1Field,5,2)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for month not a valid month as required. Valid months are 01-12. Found value '<xsl:value-of select="substring($TS1Field,5,2)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,7,2) !=''">
<xsl:analyze-string regex="0[1-9]|1[0-9]|2[0-9]|3[0-1]" select="substring($TS1Field,7,2)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for day not a valid day value as required. Valid days are 01-31. Found value '<xsl:value-of select="substring($TS1Field,7,2)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,9,2) !=''">
<xsl:analyze-string regex="0[0-9]|1[0-9]|2[0-3]" select="substring($TS1Field,9,2)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for hour not a valid hour value as required. Valid values are 00-23. Found value '<xsl:value-of select="substring($TS1Field,9,2)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,11,2) !=''">
<xsl:analyze-string regex="0[0-9]|1[0-9]|2[0-9]|3[0-9]|4[0-9]|5[0-9]" select="substring($TS1Field,11,2)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for hour not a valid for minute not a valid minute value as required. Valid values are 00-59. Found value '<xsl:value-of select="substring($TS1Field,11,2)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,13,2) !=''">
<xsl:analyze-string regex="0[0-9]|1[0-9]|2[0-9]|3[0-9]|4[0-9]|5[0-9]" select="substring($TS1Field,13,2)">
<xsl:non-matching-substring>
<dil:message type="error">Patient Death Date and Time (PID-29) value for seconds not a valid seconds value as required. Valid values are 00-59. Found value '<xsl:value-of select="substring($TS1Field,13,2)"/>' in message.</dil:message>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:for-each>
<xsl:for-each select="a:RXA/a:RXA.3">
<xsl:choose>
<xsl:when test="substring($TS1Field,15,1) !=''">
<dil:message type="error">Patient Death Date and Time (PID-29) value is too long. Valid format is CCYYMMDD. Found value '<xsl:value-of select="$TS1Field"/>' in message.</dil:message>
</xsl:when>
</xsl:choose>
</xsl:for-each>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</dil:filterruleresult>
</xsl:template>
</xsl:stylesheet>
任何建议都将不胜感激。
谢谢！
答案 0 :(得分：3)
你宣布了
<xsl:variable name="TS1Field" select="/a:VXU_V04/a:VXU_V04.ORDER/a:RXA/a:TS.1"/>
但没有TS.1元素是RXA的直接子元素（它们都在RXA.3或RXA.4内），因此变量设置为空序列，因此
<xsl:analyze-string regex="(["|'])(.*?)\1" select="$TS1Field">
会抱怨您所看到的错误。但是因为你在里面
<xsl:for-each select="a:RXA/a:RXA.3">
分析a:TS1代替$TS1Field（即您当前正在查看的特定TS1内的RXA.3）可能更有意义。