Recursive Looping with Document Function

[Eric]

Hello,

I've found syntax documentation on the document XSLT function, but I haven't
found a good resource yet on how to properly use it.

As stripped down example, I have XML files that are logically nested, where
the ParentID element of one is the file name of another...chaining all the
way to the top:

<!-- BasePage.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID>Parent1.xml</ParentID>
<Objects>
<ObjectID>1</ObjectID>
<ObjectID>3</ObjectID>
<ObjectID>5</ObjectID>
</Objects>
</Page>

<!-- Parent1.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID>Parent2.xml</ParentID>
<Objects>
<ObjectID>7</ObjectID>
<ObjectID>9</ObjectID>
<ObjectID>11</ObjectID>
</Objects>
</Page>

<!-- Parent2.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID>Parent3.xml</ParentID>
<Objects>
<ObjectID>13</ObjectID>
<ObjectID>15</ObjectID>
<ObjectID>17</ObjectID>
</Objects>
</Page>

<!-- Parent3.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID></ParentID> <!-- Top-level file -->
<Objects>
<ObjectID>19</ObjectID>
<ObjectID>21</ObjectID>
<ObjectID>23</ObjectID>
</Objects>
</Page>

How can I write my XSLT file so that it will:
- Start with BasePage.xml
- Render the ObjectIDs to the page, delimited by <br>
- Get the ParentID (parent XML file name)
- Print the parent XML file's ObjectIDs
- Repeat last two steps until ParentID is empty

Thank you,

Eric

[Pascal Schmitt]

Hello!

Not an answer to your question, but it may help:

<xslt:variable name="filename" select="'1.xml'" />
<xslt:variable name="firstFile" select="document($filename)" />
(opens 1.xml and loads it into variable firstFile)

<xslt:copy-of select="$firstFile/node()" />
(copies all contents of the variable->the file to the output)

<xslt:for-each select="$firstFile/node()">
....</xslt:for-each>
(loops through nodes)
--
Pascal Schmitt

[Joris Gillis]

Hi,
Tempore 16:00:01, die Thursday 15 September 2005 AD, hinc in foro {microsoft.public.xml,microsoft.public.xsl,microso ft.public.dotnet.xml} scripsit Eric <Er**@discussions.microsoft.com>:

I've found syntax documentation on the document XSLT function, but I haven't
found a good resource yet on how to properly use it.

As stripped down example, I have XML files that are logically nested, where
the ParentID element of one is the file name of another...chaining all the
way to the top:

<!-- BasePage.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID>Parent1.xml</ParentID>
<Objects>
<ObjectID>1</ObjectID>
<ObjectID>3</ObjectID>
<ObjectID>5</ObjectID>
</Objects>
</Page>

apply this stylesheet to the XML:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>

<xsl:template match="Page">
<xsl:apply-templates select="Objects"/>
<xsl:apply-templates select="ParentID[not(.='')]"/>
</xsl:template>

<xsl:template match="ObjectID">
<xsl:apply-templates/><br/>
</xsl:template>

<xsl:template match="ParentID">
<xsl:apply-templates select="document(.)"/>
</xsl:template>

</xsl:stylesheet>

generates:

1<br/>3<br/>5<br/>7<br/>9<br/>11<br/>13<br/>15<br/>17<br/>19<br/>21<br/>23<br/>

regards,
--
Joris Gillis (http://users.telenet.be/root-jg/me.html)
Fiat W3C in tenebris

[Eric]

Wow...I had no idea it was that simple (and could be written so concisely).
Thank you so much to the both of you, Joris and Pascal.

Just out of curiosity, do you know how I could do the same thing, but only
return a single result at random? (I've seen a lot of examples with
JavaScript on single XSL transforms, but I don't know how to apply those to
an aggregate result like we have here.)

Thanks again!

Eric
"Joris Gillis" wrote:

Hi,
Tempore 16:00:01, die Thursday 15 September 2005 AD, hinc in foro {microsoft.public.xml,microsoft.public.xsl,microso ft.public.dotnet.xml} scripsit Eric <Er**@discussions.microsoft.com>:

I've found syntax documentation on the document XSLT function, but I haven't
found a good resource yet on how to properly use it.

As stripped down example, I have XML files that are logically nested, where
the ParentID element of one is the file name of another...chaining all the
way to the top:

<!-- BasePage.xml -->
<?xml version="1.0" encoding="utf-8" ?>
<Page>
<ParentID>Parent1.xml</ParentID>
<Objects>
<ObjectID>1</ObjectID>
<ObjectID>3</ObjectID>
<ObjectID>5</ObjectID>
</Objects>
</Page>

apply this stylesheet to the XML:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>

<xsl:template match="Page">
<xsl:apply-templates select="Objects"/>
<xsl:apply-templates select="ParentID[not(.='')]"/>
</xsl:template>

<xsl:template match="ObjectID">
<xsl:apply-templates/><br/>
</xsl:template>

<xsl:template match="ParentID">
<xsl:apply-templates select="document(.)"/>
</xsl:template>

</xsl:stylesheet>

generates:

1<br/>3<br/>5<br/>7<br/>9<br/>11<br/>13<br/>15<br/>17<br/>19<br/>21<br/>23<br/>

regards,
--
Joris Gillis (http://users.telenet.be/root-jg/me.html)
Fiat W3C in tenebris

[Joris Gillis]

Tempore 16:39:07, die Thursday 15 September 2005 AD, hinc in foro {microsoft.public.xml,microsoft.public.xsl,microso ft.public.dotnet.xml} scripsit Eric <Er**@discussions.microsoft.com>:

Wow...I had no idea it was that simple (and could be written so concisely).
Thank you so much to the both of you, Joris and Pascal.

Just out of curiosity, do you know how I could do the same thing, but only
return a single result at random?

You mean, returning one single 'ObjectID' from any document in the hierarchy?
XSL has no function that returns a random value. If you can supply it externally via the parameter 'RandInteger', you could perhaps use this code:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>

<xsl:param name="RandInteger" select="915572"/>

<xsl:template match="/">
<xsl:variable name="result">
<xsl:apply-templates />
</xsl:variable>
<xsl:value-of select="substring($result,1 + 4 *
($RandInteger mod (string-length($result) div 4)),4)"/>
</xsl:template>

<xsl:template match="Page">
<xsl:apply-templates select="Objects"/>
<xsl:apply-templates select="document(ParentID[not(.='')])/*"/>
</xsl:template>

<xsl:template match="ObjectID">
<xsl:number value="." format="0001"/>
</xsl:template>

</xsl:stylesheet>
regards,
--
Joris Gillis (http://users.telenet.be/root-jg/me.html)
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