Assign long piece of repeated XSLT to variable - xslt

Question

I'm transforming some XML into a SQL query, using this template. It does what it should do.
<xsl:template match="link-info">
UNION<br/>
SELECT
<xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>.term, thesau_term.term,<br/>
COUNT(<xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>.term) AS frequency<br/>
FROM <xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/><br/>
INNER JOIN thesau_term on <xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>.term = thesau_term.priref<br/>
GROUP BY <xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>.term, thesau_term.term
<br/>
</xsl:template>
The template generates SELECT clauses for a whole bunch of tables. As you can see, table names are constructed from the XML using:
<xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>
which is repeated 5 times. Not DRY. Now, neither xsl:variable nor xsl:param seem to be intended for making things more readable, something like
<xsl:mysnippet name="table_name">
<xsl:value-of select="//database-info/#name"/>_<xsl:value-of select="key('Tagkey', forwardreferencetag)"/>
</xsl:mysnippet>
and then instead of that long clause something like this whenever required.
<xsl:mysnippet name="$table_name" />
Is there any way of doing this within XSLT 1.0?

Answer 1

This is how I might write it in XSLT 3.0
<xsl:template match="link-info" expand-text="yes">
<xsl:variable name="name_tag" select="concat(//database-info/#name,
key('Tagkey', forwardreferencetag))" as="xs:string"/>
UNION<br/>
SELECT {$name_tag}.term, thesau_term.term,<br/>
COUNT({$name_tag}.term) AS frequency<br/>
FROM {$name_tag}><br/>
INNER JOIN thesau_term on {$name_tag}.term = thesau_term.priref<br/>
GROUP BY {$name_tag}.term, thesau_term.term
<br/>
</xsl:template>
With XSLT 1.0 you can't do the curly-brace expand-text thing, but a variable is still quite an improvement:
SELECT <xsl:value-of select="$name_tag"/>.term, thesau_term.term,<br/>