I am unable to come up with a suitable workaround to kick in when an element is not available. Below are various approaches attempted without success:
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Scenario |
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A. |
<xsl:template match="/"> <area> <xsl:apply-templates select="//ns:p"/> <xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/> <xsl:apply-templates select="$hobbie"/> <xsl:choose> <xsl:when test="empty($hobbie)"> <xsl:variable name="no_hobbie" select="true"/> </xsl:when> <xsl:otherwise> <xsl:variable name="no_hobbie" select="false"/> </xsl:otherwise> </xsl:choose> </area> </xsl:template>
<xsl:if test="${no_hobbie} = 'false'"> <xsl:template match="ns:p[ns:strong='Hobbie:']"> <xsl:for-each select="text()[normalize-space() != '']"> <hobbie><xsl:value-of select="normalize-space()"/></hobbie> </xsl:for-each> </xsl:template> </xsl:if>
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Compilation error |
Error at xsl:if on line 35 column 41 XPST0003: XPath syntax error at char 1 on line 35 in {${no_hobbies}: expected "<name>", found "{" Error at xsl:if on line 35 column 41 XTSE0010: Element xsl:if must not appear directly within xsl:stylesheet Warning: at xsl:variable on line 13 column 59 SXWN9001: A variable with no following sibling instructions has no effect Warning: at xsl:variable on line 16 column 60 SXWN9001: A variable with no following sibling instructions has no effect Error at xsl:template on line 36 column 53 XTSE0010: An xsl:if element must not contain an xsl:template element Error at xsl:template on line 36 column 53 XTSE0010: Element must be used only at top level of stylesheet |
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B. |
<xsl:template match="/"> <area> <xsl:apply-templates select="//ns:p"/> <xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/> <xsl:apply-templates select="$hobbie"/> <xsl:choose> <xsl:when test="empty($hobbie)"> <hobbie>Unknown</hobbie> </xsl:when> <xsl:otherwise> <xsl:template match="ns:p[ns:strong='Hobbie:']"> <xsl:for-each select="text()[normalize-space() != '']"> <hobbie><xsl:value-of select="normalize-space()"/></hobbie> </xsl:for-each> </xsl:template> </xsl:otherwise> </xsl:choose> </area> </xsl:template>
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Compilation error |
Error at xsl:template on line 17 column 61 XTSE0010: An xsl:otherwise element must not contain an xsl:template element Error at xsl:template on line 17 column 61 XTSE0010: Element must be used only at top level of stylesheet |
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C. |
<xsl:template match="/"> <area> <xsl:apply-templates select="//ns:p"/> <xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/> <xsl:apply-templates select="$hobbie"/> <xsl:choose> <xsl:when test="empty($hobbie)"> <hobbie>Unknown</hobbie> </xsl:when> <xsl:otherwise> <xsl:call-template name="hobbie"/> </xsl:otherwise> </xsl:choose> </area> </xsl:template>
<xsl:template name="hobbie" match="ns:p[ns:strong='Hobbie:']"> <xsl:for-each select="text()[normalize-space() != '']"> <hobbie><xsl:value-of select="normalize-space()"/></hobbie> </xsl:for-each> </xsl:template>
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Output |
<hobbie>fishing</hobbie> // should pick up the valid element if there is one exist. <hobbie>Unknown</hobbie> // only create a default element value when no such element exist. |
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D. |
<xsl:template match="/"> <area> <xsl:apply-templates select="//ns:p"/> <xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/> <xsl:apply-templates select="$hobbie"/> <xsl:if test="empty($hobbie)"> <hobbie>Unknown</hobbie> </xsl:if> </area> </xsl:template>
<xsl:template match="ns:p[ns:strong='Hobbie:']"> <xsl:for-each select="text()[normalize-space() != '']"> <hobbie><xsl:value-of select="normalize-space()"/></hobbie> </xsl:for-each> </xsl:template>
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Output |
<hobbie>fishing</hobbie> // should pick up the valid element if there is one exist. <hobbie>Unknown</hobbie> // only create a default element value when no such element exist. |
I am very new XSLT and can do with some helpful suggestion.
Many thanks,
Jack