Apply-Template 仅适用于 ID 基于父子节点列表的节点

Question

I'm fairly new to XSLT and trying to solve a problem with a complex XML. Here is an example on the XML and the output wanted.

Problem is that I need to select Identity based on the Order 's IdentityOrder . The compare should be done on IdentityId .

The Order should not be included in the list if the Identity's LastName is Empty

As you can see from my experiment, I can make this work with the transformation, but I'm not able to figure out how to exclude the orders where Identity's LastName is empty.

Appreciate all help I can get;)

<Orders>
    <Order>
        <OrderNo>OR1</OrderNo>
        <BookingHeader>
            <BookingHeaderID>1</BookingHeaderID>
            <Identities>
                <Identity>
                    <IdentityId>1</IdentityId>
                    <FirstName>John</FirstName>
                    <LastName>Doe</LastName>
                </Identity>
                <Identity>
                    <IdentityId>2</IdentityId>
                    <FirstName>Petter</FirstName>
                    <LastName>Smart</LastName>
                </Identity>
                <Identity>
                    <IdentityId>3</IdentityId>
                    <FirstName>Betty</FirstName>
                    <LastName>Blue</LastName>
                </Identity>
            </Identities>
        </BookingHeader>
        <IdentityOrders>
            <IdentityOrder>
                <IdentityId>1</IdentityId>
                <Name>John Doe</Name>
            </IdentityOrder>
        </IdentityOrders>
    </Order>
    <Order>
        <OrderNo>OR2</OrderNo>
        <BookingHeader>
            <BookingHeaderID>1</BookingHeaderID>
            <Identities>
                <Identity>
                    <IdentityId>1</IdentityId>
                    <FirstName>John</FirstName>
                    <LastName>Doe</LastName>
                </Identity>
                <Identity>
                    <IdentityId>2</IdentityId>
                    <FirstName>Petter</FirstName>
                    <LastName>Smart</LastName>
                </Identity>
                <Identity>
                    <IdentityId>3</IdentityId>
                    <FirstName>Betty</FirstName>
                    <LastName>Blue</LastName>
                </Identity>
            </Identities>
        </BookingHeader>
        <IdentityOrders>
            <IdentityOrder>
                <IdentityId>1</IdentityId>
                <Name>John Doe</Name>
            </IdentityOrder>
            <IdentityOrder>
                <IdentityId>3</IdentityId>
                <Name>Betty Blue</Name>
            </IdentityOrder>
        </IdentityOrders>
    </Order>
    <Order>
        <OrderNo>OR3</OrderNo>
        <BookingHeader>
            <BookingHeaderID>1</BookingHeaderID>
            <Identities>
                <Identity>
                    <IdentityId>1</IdentityId>
                    <FirstName>John</FirstName>
                    <LastName>Doe</LastName>
                </Identity>
                <Identity>
                    <IdentityId>2</IdentityId>
                    <FirstName>Petter</FirstName>
                    <LastName></LastName>
                </Identity>
                <Identity>
                    <IdentityId>3</IdentityId>
                    <FirstName>Betty</FirstName>
                    <LastName>Blue</LastName>
                </Identity>
            </Identities>
        </BookingHeader>
        <IdentityOrders>
            <IdentityOrder>
                <IdentityId>2</IdentityId>
                <Name>Petter</Name>
            </IdentityOrder>
            <IdentityOrder>
                <IdentityId>3</IdentityId>
                <Name>Betty Blue</Name>
            </IdentityOrder>
        </IdentityOrders>
    </Order>
    <Order>
        <OrderNo>OR4</OrderNo>
        <BookingHeader>
            <BookingHeaderID>2</BookingHeaderID>
            <Identities>
                <Identity>
                    <IdentityId>4</IdentityId>
                    <FirstName>Roger</FirstName>
                    <LastName>Moore</LastName>
                </Identity>
                <Identity>
                    <IdentityId>5</IdentityId>
                    <FirstName>Sylvester</FirstName>
                    <LastName></LastName>
                </Identity>
                <Identity>
                    <IdentityId>6</IdentityId>
                    <FirstName>Arnold</FirstName>
                    <LastName></LastName>
                </Identity>
            </Identities>
        </BookingHeader>
        <IdentityOrders>
            <IdentityOrder>
                <IdentityId>4</IdentityId>
                <Name>Roger Moore</Name>
            </IdentityOrder>
            <IdentityOrder>
                <IdentityId>5</IdentityId>
                <Name>Sylvester</Name>
            </IdentityOrder>
        </IdentityOrders>
    </Order>
</Orders>

Wanted result after transformation

<?xml version="1.0" encoding="utf-8"?>
<Orders>
  <Order>
    <OrderNo>OR1</OrderNo>
    <Identities>
      <Identity>
        <IdentityId>1</IdentityId>
        <FirstName>John</FirstName>
        <LastName>Doe</LastName>
      </Identity>
    </Identities>
  </Order>
  <Order>
    <OrderNo>OR2</OrderNo>
    <Identities>
      <Identity>
        <IdentityId>1</IdentityId>
        <FirstName>John</FirstName>
        <LastName>Doe</LastName>
      </Identity>
      <Identity>
        <IdentityId>3</IdentityId>
        <FirstName>Betty</FirstName>
        <LastName>Blue</LastName>
      </Identity>
    </Identities>
  </Order>
  <Order>
    <OrderNo>OR3</OrderNo>
    <Identities>
      <Identity>
        <IdentityId>3</IdentityId>
        <FirstName>Betty</FirstName>
        <LastName>Blue</LastName>
      </Identity>
    </Identities>
  </Order>
  <Order>
    <OrderNo>OR4</OrderNo>
    <Identities>
      <Identity>
        <IdentityId>4</IdentityId>
        <FirstName>Roger</FirstName>
        <LastName>Moore</LastName>
      </Identity>
    </Identities>
  </Order>
</Orders>

XSLT Transformation script.

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"
>
    <xsl:output method="xml" indent="yes" />

    <xsl:template match="/*">
        <Orders>
            <xsl:apply-templates select="Order[BookingHeader/Identities/Identity[LastName[text()]]]" />
        </Orders>
    </xsl:template>
    <xsl:template match="Order">tra
        <Order>
            <OrderNo>
                <xsl:value-of select="OrderNo" />
            </OrderNo>
            <Identities>
                <xsl:for-each select="IdentityOrders/IdentityOrder">
                    <xsl:variable name="id" select="IdentityId" />
                    <xsl:for-each select="../../BookingHeader/Identities/Identity">
                        <xsl:if test="(IdentityId=$id) and (LastName!='') ">
                            <xsl:apply-templates select="." />
                        </xsl:if>
                    </xsl:for-each>
                </xsl:for-each>
            </Identities>
        </Order>
    </xsl:template>

    <xsl:template match="Identity">
        <Identity>
            <IdentityId>
                <xsl:value-of select="IdentityId" />
            </IdentityId>
            <FirstName>
                <xsl:value-of select="FirstName" />
            </FirstName>
            <LastName>
                <xsl:value-of select="LastName" />
            </LastName>
        </Identity>
    </xsl:template>
</xsl:stylesheet>

Answer 1

I am guessing (:) you want to do:

XSLT 1.0

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:key name="id" match="Identity" use="concat(IdentityId, '|', ancestor::Order/OrderNo)" />

<xsl:template match="/Orders">
    <xsl:copy>
        <xsl:for-each select="Order">
            <xsl:variable name="id" select="key('id', concat(IdentityOrders/IdentityOrder/IdentityId, '|', OrderNo))" />
            <xsl:if test="$id/LastName/text()">
                <xsl:copy>
                    <xsl:copy-of select="OrderNo"/>
                    <Identities>
                        <xsl:copy-of select="$id"/>
                    </Identities>
                </xsl:copy>
            </xsl:if>
        </xsl:for-each> 
    </xsl:copy>
</xsl:template>

</xsl:stylesheet>

This uses a key to select the Identity whose IdentityId is listed in IdentityOrders . Then it checks if the selected Identity has a value in its LastName and if it does, it copies the Order along with its OrderNo and the selected Identity .

Note that the structure of your XML allows an Order to have more that one IdentityOrder - and it's not clear what the result should be in such case.