<xsl:variable name="descrip" select="substring(Descripcion,1,90)"/> with disable-output-scaping

<xsl:variable name="descrip"  select="substring(Descripcion,1,开发者_Python百科90)" disable-output-escaping="yes"/>

thats it this doesn't compile is there any workaround for this?

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No, there isn't any "workaround".

DOE is only defined in the XSLT specification for <xsl:value-of> and for <xsl:text>