Bad practice

I hope this message gets to the list, cause my last fews seems that don't. 

What are the consequences of a construction like this in terms of
performance, and what about coding style?

I'm creating a table like this where diasemana.xml is a xml
representation of week days:

                        <table id="{$t}" border="1">
                                <th>Processo</th>
                                <xsl:for-each 
select="document('diassemana.xml')/dias/dia">
                                        <th>
                                                <xsl:value-of select="@txt"/>
                                        </th>
                                </xsl:for-each>
                                <xsl:apply-templates 
select="/GHoras/Processos/Processo"/>
                        </table>

        <xsl:template match="Processo">
                <tr prK="{Processo_K}">
                        <xsl:variable name="this" select="."/>
                        <td>
                                <xsl:value-of select="NomeProcesso"/>
                        </td>
                        <xsl:for-each 
select="document('diassemana.xml')/dias/dia">
                                <xsl:variable name="pos" select="position()"/>
                                <xsl:for-each select="$this">
                                        <xsl:call-template name="edhoras">
                                                <xsl:with-param name="dia" 
select="$pos"/>
                                        </xsl:call-template>
                                </xsl:for-each>
                        </xsl:for-each>
                </tr>
        </xsl:template>

This second use of document() serves only to do a 7th time loop,
without using any data, and the nested for-each is simply to change
context.

Is this a bad practice?

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