如何在命名空间作用域中选择元素并在输出中删除空的默认命名空间

时间：2011-06-06 11:03:38

标签： xslt xpath

我需要转换以下输入文件

<?xml version="1.0"?>
<soap:Envelope 
    xmlns:soap="http://www.w3.org/2003/05/soap-envelope" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" 
    xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" 
    xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
    <env:Header xmlns:env="http://www.w3.org/2003/05/soap-envelope">
        <wsa:Action>http://worksite.imanage.com/SearchDocumentsResponse</wsa:Action>
        <wsa:MessageID>urn:uuid:b9b79a0f-b4de-4686-9c54-51c5a7f99331</wsa:MessageID>
        <wsa:RelatesTo>urn:uuid:8e88f531-8369-4557-80bf-e8a9835d8eb3</wsa:RelatesTo>
        <wsa:To>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</wsa:To>
        <wsse:Security>
            <wsu:Timestamp wsu:Id="Timestamp-ea526ce6-ca66-4aaf-aae9-cf2fe8d5cbad">
                <wsu:Created>2011-06-01T07:09:20Z</wsu:Created>
                <wsu:Expires>2011-06-01T07:14:20Z</wsu:Expires>
            </wsu:Timestamp>
        </wsse:Security>
    </env:Header>
    <soap:Body>
        <SearchDocumentsResult xmlns="http://worksite.imanage.com">
            <Documents>
                <Document>
                    <ObjectID>!nrtdms:0:!session:PTHT096:!database:Technical:!document:803226,1:</ObjectID>
                    <Database>Technical</Database>
                    <Profile>
                        <ProfileItem>
                            <AttributeID>imProfileDocNum</AttributeID>
                            <Value>803226</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileDescription</AttributeID>
                            <Value>TC-D60-1087 - Compressor C-301C Installation Work Platform General Arrangement</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileVersion</AttributeID>
                            <Value>1</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileCustom3</AttributeID>
                            <Value>CV</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileDatabase</AttributeID>
                            <Value>Technical</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileExtension</AttributeID>
                            <Value>ACROBAT</Value>
                        </ProfileItem>
                    </Profile>
                </Document>
            </Documents>
        </SearchDocumentsResult>
    </soap:Body>
</soap:Envelope>

进入以下输出文件

<?xml version="1.0"?>
<soap:Envelope 
    xmlns:soap="http://www.w3.org/2003/05/soap-envelope" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" 
    xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" 
    xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
    <env:Header xmlns:env="http://www.w3.org/2003/05/soap-envelope">
        <wsa:Action>http://worksite.imanage.com/SearchDocumentsResponse</wsa:Action>
        <wsa:MessageID>urn:uuid:b9b79a0f-b4de-4686-9c54-51c5a7f99331</wsa:MessageID>
        <wsa:RelatesTo>urn:uuid:8e88f531-8369-4557-80bf-e8a9835d8eb3</wsa:RelatesTo>
        <wsa:To>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</wsa:To>
        <wsse:Security>
            <wsu:Timestamp wsu:Id="Timestamp-ea526ce6-ca66-4aaf-aae9-cf2fe8d5cbad">
                <wsu:Created>2011-06-01T07:09:20Z</wsu:Created>
                <wsu:Expires>2011-06-01T07:14:20Z</wsu:Expires>
            </wsu:Timestamp>
        </wsse:Security>
    </env:Header>
    <soap:Body>
        <SearchDocumentsResult xmlns="http://worksite.imanage.com">
            <Documents>
                <Document>
                    <ObjectID>!nrtdms:0:!session:PTHT096:!database:Technical:!document:803226,1:</ObjectID>
                    <Database>Technical</Database>
                    <Profile>
                        <ProfileItem>
                            <AttributeID>imProfileDocNum</AttributeID>
                            <Value>803226</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileDescription</AttributeID>
                            <Value>TC-D60-1087 - Compressor C-301C Installation Work Platform General Arrangement</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileVersion</AttributeID>
                            <Value>1</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileCustom3</AttributeID>
                            <Value>CV</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileDatabase</AttributeID>
                            <Value>Technical</Value>
                        </ProfileItem>
                        <ProfileItem>
                            <AttributeID>imProfileExtension</AttributeID>
                            <Value>pdf</Value>
                        </ProfileItem>
                    </Profile>
                </Document>
            </Documents>
        </SearchDocumentsResult>
    </soap:Body>
</soap:Envelope>

我写了以下样式表来完成这项工作

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet 
xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
xmlns:xs = "http://www.w3.org/2001/XMLSchema"
xmlns:soap = "http://www.w3.org/2003/05/soap-envelope"
    xmlns:w = "http://worksite.imanage.com"
exclude-result-prefixes="#all"
version="2.0">

<xsl:output indent="yes"/>

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

<xsl:template match="attribute()|text()|comment()|processing-instruction()">
    <xsl:copy/>
</xsl:template>

<xsl:template match = "//w:ProfileItem[6]/child::w:Value">        
    <xsl:call-template name="changeDocumentExtension"/>
</xsl:template>

<xsl:template name = "changeDocumentExtension">

    <xsl:variable 
    name="iManageExtension"
    as = "xs:string"
    select="//w:AttributeID[. = 'imProfileExtension']/following::w:Value"
    />

    <xsl:choose>
    <xsl:when test="$iManageExtension eq 'ACROBAT'">
        <Value>pdf</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'ANSI'">
        <Value>txt</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'EXCEL'">
        <Value>xsl</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'EXCELX'">
        <Value>xslx</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'PDF230'">
        <Value>pdf</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'WORD'">
        <Value>doc</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'WORDX'">
        <Value>docx</Value>
    </xsl:when>
    <xsl:when test="$iManageExtension eq 'WORDXT'">
        <Value>docx</Value>
    </xsl:when>
    </xsl:choose>               

</xsl:template>      

</xsl:stylesheet>

这是我得到的输出

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope 
    xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing"
    xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"
    xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
    <env:Header xmlns:env="http://www.w3.org/2003/05/soap-envelope">
    <wsa:Action>http://worksite.imanage.com/SearchDocumentsResponse</wsa:Action>
    <wsa:MessageID>urn:uuid:b9b79a0f-b4de-4686-9c54-51c5a7f99331</wsa:MessageID>
    <wsa:RelatesTo>urn:uuid:8e88f531-8369-4557-80bf-e8a9835d8eb3</wsa:RelatesTo>
    <wsa:To>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</wsa:To>
    <wsse:Security>
        <wsu:Timestamp wsu:Id="Timestamp-ea526ce6-ca66-4aaf-aae9-cf2fe8d5cbad">
        <wsu:Created>2011-06-01T07:09:20Z</wsu:Created>
        <wsu:Expires>2011-06-01T07:14:20Z</wsu:Expires>
        </wsu:Timestamp>
    </wsse:Security>
    </env:Header>
    <soap:Body>
    <SearchDocumentsResult xmlns="http://worksite.imanage.com">
        <Documents>
        <Document>
            <ObjectID>!nrtdms:0:!session:PTHT096:!database:Technical:!document:803226,1:</ObjectID>
            <Database>Technical</Database>
            <Profile>
            <ProfileItem>
                <AttributeID>imProfileDocNum</AttributeID>
                <Value>803226</Value>
            </ProfileItem>
            <ProfileItem>
                <AttributeID>imProfileDescription</AttributeID>
                <Value>TC-D60-1087 - Compressor C-301C Installation Work Platform General Arrangement</Value>
            </ProfileItem>
            <ProfileItem>
                <AttributeID>imProfileVersion</AttributeID>
                <Value>1</Value>
            </ProfileItem>
            <ProfileItem>
                <AttributeID>imProfileCustom3</AttributeID>
                <Value>CV</Value>
            </ProfileItem>
            <ProfileItem>
                <AttributeID>imProfileDatabase</AttributeID>
                <Value>Technical</Value>
            </ProfileItem>
            <ProfileItem>
                <AttributeID>imProfileExtension</AttributeID>
                <Value xmlns="">pdf</Value>
            </ProfileItem>
            </Profile>
        </Document>
        </Documents>
    </SearchDocumentsResult>
    </soap:Body>
</soap:Envelope>

我想在以下问题上获得一些帮助：

  1. 输出中有一个不需要的xmlns =“”元素，使用exclude-result-prefixes属性无法删除。我不知道怎么摆脱它。

  2. 样式表有两个很长的XPath。他们完成工作并指向正确的元素，但每次看到它们时我都忍不住畏缩。如果有人能提供更短，更清洁的选择，我真的很感激。

2 个答案:

答案 0 :(得分：3)

简化XPath

我建议你在变换中包含一个带有默认命名空间前缀的声明。例如

 <SearchDocumentsResult xmlns="http://worksite.imanage.com">

您可以在样式表元素中添加w前缀：

<xsl:stylesheet 
xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
xmlns:xs = "http://www.w3.org/2001/XMLSchema"
xmlns:soap = "http://www.w3.org/2003/05/soap-envelope"
xmlns:w = "http://worksite.imanage.com"
exclude-result-prefixes="#all"
version="2.0">

这将使您更容易在命名空间中选择元素，从而可以避免与namespace-uri()进行XPath匹配并简化XPath。

关于XPath，您的选择必须绝对多少？例如，以下内容对我来说也是如此：

"/soap:Envelope/soap:Body[1]/w:SearchDocumentResult/*[1]/*[1]/*[1]/*[6]/*[1]"

但你也可以使用：

"/soap:Envelope/soap:Body[1]/w:SearchDocumentResult//w:Value[1]"

删除空命名空间

要摆脱Value元素中出现的空命名空间，您需要修复样式表，以便每个Value元素都正确地位于命名空间中。例如：

<xsl:when test="$iManageExtension eq 'ACROBAT'">
  <xsl:element 
       name="Value" 
       namespace="http://worksite.imanage.com">
       pdf
  </xsl:element>

通过这种方式，系统通常会输出没有命名空间的元素。     

关于简化XPath的进一步说明

请注意在某些情况下，您可能只需要管理特定的命名空间：

<xsl:stylesheet 
xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
xmlns:xs = "http://www.w3.org/2001/XMLSchema"
xmlns:soap = "http://www.w3.org/2003/05/soap-envelope"
exclude-result-prefixes="#all"
xpath-default-namespace="http://worksite.imanage.com"
version="2.0">

并且没有名称空间前缀。

答案 1 :(得分：1)

以下样式表完成了这项工作：

    <?xml version="1.0" encoding="UTF-8"?>

    <xsl:stylesheet 
        xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
        xmlns:xs = "http://www.w3.org/2001/XMLSchema"   
        xmlns:w = "http://worksite.imanage.com"      
        exclude-result-prefixes="#all"
        version="2.0">

    <xsl:output indent="yes"/>

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

    <xsl:template match="attribute()|text()|comment()|processing-instruction()">
        <xsl:copy/>
    </xsl:template>

    <xsl:template match = "//w:ProfileItem[6]/child::w:Value">
        <xsl:element name="{local-name()}" namespace="http://worksite.imanage.com">
            <xsl:call-template name="changeDocumentExtension"/>
        </xsl:element>
    </xsl:template>

    <xsl:template name="changeDocumentExtension">

        <xsl:variable 
            name="iManageExtension" 
            as="xs:string"
            select="//w:AttributeID[. = 'imProfileExtension']/following::w:Value"/>

        <xsl:choose>
            <xsl:when test="$iManageExtension eq 'ACROBAT'"> pdf </xsl:when>
            <xsl:when test="$iManageExtension eq 'ANSI'"> txt </xsl:when>
            <xsl:when test="$iManageExtension eq 'EXCEL'"> xsl </xsl:when>
            <xsl:when test="$iManageExtension eq 'EXCELX'"> xslx </xsl:when>
            <xsl:when test="$iManageExtension eq 'HTML'"> htm </xsl:when>
            <xsl:when test="$iManageExtension eq 'JPEG'"> jpg </xsl:when>
            <xsl:when test="$iManageExtension eq 'PDF230'"> pdf </xsl:when>
            <xsl:when test="$iManageExtension eq 'PPT'"> ppt </xsl:when>
            <xsl:when test="$iManageExtension eq 'PPTX'"> pptx </xsl:when>
            <xsl:when test="$iManageExtension eq 'WORD'"> doc </xsl:when>
            <xsl:when test="$iManageExtension eq 'WORDX'"> docx </xsl:when>
            <xsl:when test="$iManageExtension eq 'WORDXT'"> docx </xsl:when>
        </xsl:choose>

    </xsl:template>      

</xsl:stylesheet>
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