Reproduced in build 070206.

To reproduce the bug:
- create a new XSLT project;
- add 2 new schemas of PO structure;
- create an XSL transformation file;
- open it in Mapper;
- bind purchaseOrder elements of source and target trees;
- switch to source.

The following template is generated:

    <xsl:template match="/">
        <xsl:element name="ns:purchaseOrder">
            <xsl:value-of select="/purchaseOrder"/>
        </xsl:element>
        <xsl:element name="ns:purchaseOrder">
            <xsl:value-of select=""/>
        </xsl:element>
    </xsl:template>