<fo:basic-link> not creating clickable link XSL-FO XSLT 1.0 - xslt

Question

Given this XML:
<figure id="fig-0011">
<title>Removal of Shipping Kit(s)</title>
<graphic id="fig-0011-gra-0001" infoEntityIdent="66503-00129-A-001-01"></graphic>
</figure>
and
<proceduralStep><para>Remove screw (see <internalRef internalRefId="fig-0011" internalRefTargetType="irtt01"></internalRef>)
<proceduralStep><para>Remove two screws (10) (see <internalRef internalRefId="fig-0011-gra-0001" internalRefTargetType="irtt09"></internalRef>),
I'm trying to create links to the figures and graphics. The link to the figure is working correctly, but the link to the graphic is not:
<fo:basic-link>
<xsl:attribute name="internal-destination"><xsl:apply-templates select="//dmodule/identAndStatusSection/dmAddress/dmIdent/dmCode"/><xsl:value-of select="#internalRefId"/></xsl:attribute>
<xsl:variable name="targetElement" select="local-name(key('id',#internalRefId))"/>
<xsl:for-each select="key('id',(#internalRefId))">
<xsl:choose>
<xsl:when test="$targetElement='graphic'">
<xsl:text>Fig </xsl:text>
<xsl:number count="figure" from="content" level="any"/>
</xsl:when>
<xsl:when test="$targetElement='figure'">
<xsl:text>Fig </xsl:text>
<xsl:number count="figure" from="content" level="any"/>
</xsl:when>
</xsl:choose>
</xsl:for-each>
Key:
<xsl:key name="id" match="*" use="#id"/>
Figure:
<xsl:template match="figure">
<xsl:apply-templates select="graphic"/>
</xsl:template>
<xsl:template match="figure/graphic" priority="10">
<fo:block text-align="center" start-indent="0pt" color="black" keep-with-next="always">
<xsl:call-template name="do-graphic">
<xsl:with-param name="include-graphic" select="true()"/>
</xsl:call-template>
</fo:block>
<xsl:if test="position()=last()">
<xsl:apply-templates select="../legend"/>
</xsl:if>
<xsl:if test="#infoEntityIdent">
<fo:block text-align="right" keep-with-previous="always">
<xsl:value-of select="#infoEntityIdent"/>
</fo:block>
</xsl:if>
<fo:block font-weight="normal" font-style="italic" text-align="center" space-before="12pt" space-after="8pt" start-indent="0pt" keep-with-previous="always">
<xsl:if test="../#id">
<xsl:attribute name="id"><xsl:apply-templates select="//dmodule/identAndStatusSection/dmAddress/dmIdent/dmCode"/><xsl:value-of select="../#id"/></xsl:attribute>
</xsl:if>
<xsl:text>Fig </xsl:text>
<xsl:number count="figure" level="any" format="1" from="content"/>
<xsl:apply-templates select="../title"/>
<xsl:variable name="numSheets" select="count(../graphic)"/>
<xsl:choose>
<xsl:when test="$numSheets>1">
<xsl:text> (Sheet </xsl:text>
<xsl:number count="graphic" level="any" format="1" from="figure"/>
<xsl:text> of </xsl:text>
<xsl:value-of select="$numSheets"/>
<xsl:text>)</xsl:text>
</xsl:when>
</xsl:choose>
</fo:block>
Graphic:
<xsl:template match="graphic">
<fo:inline-container>
<fo:block space-before="12pt" space-before.conditionality="retain">
<xsl:call-template name="do-graphic"/>
</fo:block>
</fo:inline-container>
</xsl:template>
<xsl:template name="do-graphic">
<xsl:param name="include-graphic" select="true()"/>
<xsl:variable name="content-width">
<xsl:choose>
<xsl:when test="#reproductionWidth != ''">
<xsl:value-of select="#reproductionWidth"/>
</xsl:when>
<!-- coding for reproduction scale based on clarifications in Issue 4.1 -->
<xsl:when test="#reproductionScale != ''">
<xsl:value-of select="#reproductionScale"/>
<xsl:text>%</xsl:text>
</xsl:when>
<xsl:otherwise>95%</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="content-height">
<xsl:choose>
<xsl:when test="#reproductionHeight != ''">
<xsl:value-of select="#reproductionHeight"/>
</xsl:when>
<xsl:when test="#reproductionScale != ''">
<xsl:value-of select="#reproductionScale"/>
<xsl:text>%</xsl:text>
</xsl:when>
<xsl:otherwise>95%</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:choose>
<xsl:when test="$include-graphic">
<fo:external-graphic src="{unparsed-entity-uri(#infoEntityIdent)}" scaling="uniform" content-height="{$content-height}" content-width="{$content-width}"/>
</xsl:when>
<xsl:otherwise>
<fo:inline-container display-align="center" text-align="center" block-progression-dimension="{$content-height}" inline-progression-dimension="{$content-width}" background-color="silver" color="red">
<fo:block>Graphic Not Included</fo:block>
</fo:inline-container>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
This returns:
Remove two screws (10) (see Fig 2)
which is the correct figure number, but the 2 is not a clickable link to the graphic.
The dmcode template builds a string. If I remove that from the XSLT then the figure number no longer links to the figure.
I am using XSLT 1.0. I appreciate any help, thank you.

Answer 1

The second internalRef refers to a graphic. It appears that your XSLT is not copying the graphic/#id into the FO in the result tree. With AH Formatter and a stylesheet that doesn't copy graphic/#id, I get no link and the error message:
Unresolved internal-destination: "fig-0011-gra-0001".
It appears that your FO formatter also isn't making the link when there's no matching target ID.
I can't help you much more without seeing your xsl:key declaration(s), the templates for figure and graphic, and knowing whether graphic can appear outside of figure.
Reedited to use figure/#id and graphic/#id:
<xsl:key name="id" match="*" use="#id" />
<xsl:variable name="prefix">
<xsl:apply-templates select="//dmodule/identAndStatusSection/dmAddress/dmIdent/dmCode" />
</xsl:variable>
<xsl:template match="internalRef">
<xsl:for-each select="key('id', #internalRefId)">
<fo:basic-link internal-destination="{$prefix}{#id}">
<xsl:text>Fig </xsl:text>
<xsl:number count="figure" from="content" level="any" />
</fo:basic-link>
</xsl:for-each>
</xsl:template>
<xsl:template match="figure">
<fo:wrapper id="{#id}">
<xsl:apply-templates select="graphic" />
</fo:wrapper>
</xsl:template>
<xsl:template match="figure/graphic" priority="10">
<fo:block text-align="center" start-indent="0pt" color="black" keep-with-next="always">
<xsl:if test="#id">
<xsl:attribute name="id">
<xsl:value-of select="$prefix" />
<xsl:value-of select="#id" />
</xsl:attribute>
</xsl:if>
<xsl:call-template name="do-graphic">
<xsl:with-param name="include-graphic" select="true()" />
</xsl:call-template>
</fo:block>
<xsl:if test="position() = last()">
<xsl:apply-templates select="../legend" />
</xsl:if>
<xsl:if test="#infoEntityIdent">
<fo:block text-align="right" keep-with-previous="always">
<xsl:value-of select="#infoEntityIdent" />
</fo:block>
</xsl:if>
<fo:block font-weight="normal" font-style="italic" text-align="center" space-before="12pt" space-after="8pt" start-indent="0pt" keep-with-previous="always">
<xsl:text>Fig </xsl:text>
<xsl:number count="figure" level="any" format="1" from="content" />
<xsl:apply-templates select="../title" />
<xsl:variable name="numSheets" select="count(../graphic)" />
<xsl:choose>
<xsl:when test="$numSheets > 1">
<xsl:text> (Sheet </xsl:text>
<xsl:number count="graphic" level="any" format="1" from="figure" />
<xsl:text> of </xsl:text>
<xsl:value-of select="$numSheets" />
<xsl:text>)</xsl:text>
</xsl:when>
</xsl:choose>
</fo:block>
</xsl:template>
I also moved the graphic's ID to the first fo:block in the figure/graphic template. Having it on the last fo:block would have meant scrolling up to see the graphic every time that you followed a link to a graphic.

Answer 2

It was suggested to add <xsl:attribute name="id"> to the <fo:external-graphic> in the do-graphic template and that seems to solve the problem:
<xsl:template name="do-graphic">
<xsl:param name="include-graphic" select="true()"/>
<xsl:variable name="content-width">
<xsl:choose>
<xsl:when test="#reproductionWidth != ''">
<xsl:value-of select="#reproductionWidth"/>
<xsl:call-template name="checkForUom">
<xsl:with-param name="measure" select="#reproductionWidth"/>
</xsl:call-template>
</xsl:when>
<!-- coding for reproduction scale based on clarifications in Issue 4.1 -->
<xsl:when test="#reproductionScale != ''">
<xsl:value-of select="#reproductionScale"/>
<xsl:text>%</xsl:text>
</xsl:when>
<xsl:otherwise>95%</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="content-height">
<xsl:choose>
<xsl:when test="#reproductionHeight != ''">
<xsl:value-of select="#reproductionHeight"/>
<xsl:call-template name="checkForUom">
<xsl:with-param name="measure" select="#reproductionWidth"/>
</xsl:call-template>
</xsl:when>
<!-- coding for reproduction scale based on clarifications in Issue 4.1 -->
<xsl:when test="#reproductionScale != ''">
<xsl:value-of select="#reproductionScale"/>
<xsl:text>%</xsl:text>
</xsl:when>
<xsl:otherwise>95%</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:choose>
<xsl:when test="$include-graphic">
<fo:external-graphic src="{unparsed-entity-uri(#infoEntityIdent)}" scaling="uniform" content-height="{$content-height}" content-width="{$content-width}">
<xsl:attribute name="id"><xsl:apply-templates select="//dmodule/identAndStatusSection/dmAddress/dmIdent/dmCode"/><xsl:value-of select="#id"/></xsl:attribute>
</fo:external-graphic>
</xsl:when>
<xsl:otherwise>
<fo:inline-container display-align="center" text-align="center" block-progression-dimension="{$content-height}" inline-progression-dimension="{$content-width}" background-color="silver" color="red">
<fo:block>Graphic Not Included</fo:block>
</fo:inline-container>
</xsl:otherwise>
</xsl:choose>
</xsl:template>