XSLT to convert XML to text - xslt

Question

I have a requirement where i need to generate a text file from XML document, generated text file should be in some particular format based on some rules. My XML looks something shown below:
<info>
<Tag1>
<Tag2>
<Tag3>
<PartNo>12 </PartNo>
</Tag3>
<DBOMInf1> 111 </DBOMInf1>
<DBOMInf2> sring </DBOMInf2>
</Tag2>
<Tag2>
<Tag3>
<PartNo>12 </PartNo>
</Tag3>
<DBOMInf1> 555 </DBOMInf1>
<DBOMInf2> abcd </DBOMInf2>
</Tag2>
</Tag1>
<Tag4>
<Tag5>
<Description>1200 liter </Description>
<No>12</No>
<Name>Engine</Name>
<Id>700</Id>
</Tag5>
</Tag4>
<action>
<actionId>700</actionId>
</action>
</info>
Expected output format in text:
ACTIONID|NO|DESCRIPTION|NAME|DBOMInf1|DBOMInf2
700|12|Engine|1200 liter| 111|sring
700|12|Engine|1200 liter| 555|abcd
I am new to XSLT programming can any body share some info or example on how can i achieve this , i am familiar with basis of XSLT like templates matching, value of select.
Any link, or example will be very helpful.
Thanks

Answer 1

It looks like you want a row for each Tag2 element, in which case these are easily matching by doing the following (assuming you are currently positioned on the info element
<xsl:apply-templates select="Tag1/Tag2" />
But it also looks like you want to look up information from Tag5 elements. In this case you could use a key to look up such values, based on the No element. The key would be defined as follows:
<xsl:key name="Tags" match="Tag5" use="No" />
And to look up the tags for a given Tag2 element, you could do the following:
<xsl:apply-templates select="key('Tags', normalize-space(Tag3/PartNo))" />
(Note, normalize-space with remove the excess white-space from the element)
Here is the full XSLT
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text" indent="yes"/>
<xsl:key name="Tags" match="Tag5" use="No" />
<xsl:template match="/info">
<xsl:text>ACTIONID|NO|DESCRIPTION|NAME|DBOMInf1|DBOMInf2</xsl:text>
<xsl:value-of select="'
'" />
<xsl:apply-templates select="Tag1/Tag2" />
</xsl:template>
<xsl:template match="Tag2">
<xsl:apply-templates select="key('Tags', normalize-space(Tag3/PartNo))" />
<xsl:value-of select="concat(DBOMInf1, '|', DBOMInf2, '
')" />
</xsl:template>
<xsl:template match="Tag5">
<xsl:value-of select="concat(Id, '|', No, '|', Name, '|', Description, '|')" />
</xsl:template>
</xsl:stylesheet>
When applied to your input XML, the following text is output
ACTIONID|NO|DESCRIPTION|NAME|DBOMInf1|DBOMInf2
700|12|Engine|1200 liter | 111 | sring
700|12|Engine|1200 liter | 555 | abcd