Re: [xsl] What is a bulletproof way to assign a variable this value: single quote, value of an element, single quote?

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

On 13/05/2024 15:05, Roger L Costello costello@xxxxxxxxx wrote:
> Hi Folks,
>
> The value of $legacy-elmt is this element:
>
>        <test>Hello, world</test>
>
> Create a variable which holds between single quotes the value of the element
that $legacy-elmt holds. Do this using a two-step process:
> <xsl:variable name="tmp-legacy-elmt-value" as="xs:string+">
>              <xsl:text>'</xsl:text>
>              <xsl:value-of select="string($legacy-elmt)"/>
>              <xsl:text>'</xsl:text>
> </xsl:variable>
>
> <xsl:variable name="legacy-elmt-name" as="xs:string">
>              <xsl:value-of select="$tmp-legacy-elmt-value" separator=""/>
>   </xsl:variable>
>
> $legacy-elmt-value = 'Hello, world'
>
> That appears to work flawlessly, right?
>
> Not so fast.
>
> Suppose the value of $legacy-elmt is this element:
>
>        <test>O'Neil</test>
>
> $legacy-elmt-value = 'O'Neil'
>
> That is an error (unmatched single quote).
>
> What is the best way to fix this error?

Which escape mechanism do you want to use, XPath 2 and later one to
double the single quote?

B <xsl:variable name="legacy-elmt-value" as="xs:string" select="'''' ||
replace($legacy-elmt, '''', '$0$0') || ''''"/>