写类似下面的东西，就3个小功能点。做个判断，然后相应的改另外一个字段的值
qq 1984415
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<xsl:template match="*[contains(local-name(),'__')]">
                                                                                <xsl:element name="{substring-before(local-name(),'__')}">
                                                                                        <xsl:for-each select="@*">
                                                                                                <xsl:copy/>
                                                                                        </xsl:for-each>
                                                                                        <xsl:apply-templates select="." mode="TechnicalFields"/>
                                                                                        <xsl:apply-templates select="node()"/>
                                                                                </xsl:element>
                                                                        </xsl:template>
                                                                        <xsl:template match="/*">
                                                                                <xsl:variable name="ns_prefix" select="substring-before(name(),':')"/>
                                                                                <xsl:element name="{$ns_prefix}:PurchaseOrderBundleMaintainRequest_sync" namespace="http://sap.com/xi/SAPGlobal20/Global">
                                                                                        <xsl:for-each select="@*">
                                                                                                <xsl:copy/>
                                                                                        </xsl:for-each>
                                                                                        <BasicMessageHeader xmlns=""/>
                                                                                        <xsl:apply-templates/>
                                                                                </xsl:element>
                                                                        </xsl:template>
                                                                        <xsl:template match="//BuyerParty">
                                                                                <xsl:copy>
                                                                                        <xsl:attribute name="actionCode"><xsl:value-of select="'04'"/></xsl:attribute>
                                                                                        <xsl:for-each select="@*">
                                                                                                <xsl:copy/>
                                                                                        </xsl:for-each>
                                                                                        <xsl:apply-templates/>
                                                                                </xsl:copy>
                                                                        </xsl:template>