XSL Sort specifc value last - xslt

Is it possible to sort nodes as follows:
Example XML
<record>
<id>0</id>
<sku>0</sku>
<name>Title</name>
<prop>456</prop>
<number>99</number>
</record>
If I apply this template
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="record/*">
<xsl:param select="." name="value"/>
<div>
<xsl:value-of select="concat(local-name(), ' - ', $value)"/>
</div>
</xsl:template>
</xsl:stylesheet>
Ouput:
<div>id - 0</div>
<div>sku - 0</div>
<div>name - Title</div>
<div>prop - 456</div>
<div>number - 99</div>
However, I would like all 0 values to be outputted last, as so:
<div>name - Title</div>
<div>prop - 456</div>
<div>number - 99</div>
<div>id - 0</div>
<div>sku - 0</div>
Is this possible by applying a sort to the <xsl:apply-templates/>?

There is an easy way of achieving this with XSLT-1.0. Just use a predicate on xsl:apply-templates checking if the content is zero:
<xsl:template match="record/*">
<div>
<xsl:value-of select="concat(local-name(), ' - ', .)"/>
</div>
</xsl:template>
<xsl:template match="/record">
<xsl:apply-templates select="*[normalize-space(.) != '0']" />
<xsl:apply-templates select="*[normalize-space(.) = '0']" />
</xsl:template>
This does not sort the output, but groups it the way you want it. The xsl:param is unnecessary.

As far as I see your question, the issue is not any sort at all.
You even didn't write what is the specific value, which you mentioned
it the title. It is rather an arbitrary sequence of child elements of record.
Try the following script, performing just that:
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:transform version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="UTF-8" indent="yes" />
<xsl:template match="record">
<xsl:copy>
<xsl:apply-templates select="name, prop, number, id, sku"/>
</xsl:copy>
</xsl:template>
<xsl:template match="record/*">
<div><xsl:value-of select="concat(local-name(), ' - ', .)"/></div>
</xsl:template>
<xsl:template match="#*|node()">
<xsl:copy><xsl:apply-templates select="#*|node()"/></xsl:copy>
</xsl:template>
</xsl:transform>
I used XSLT 2.0, because initially you did't specify the XSLT version.
Could you move on to version 2.0? As you can see, it allows to write quite
an elegent solution (impossible in version 1.0).
I also changed your template matching record/*. You actually don't
need any param. It is enough to use . - the value of the current
element.
Edit
Another possibility is that you want the following sort:
First, elements with non-numeric value (in your case, only name),
maybe without any sort.
Then elements with numeric value, sorted descending on this value.
If this is the case, then change the template matching record to the
following:
<xsl:template match="record">
<xsl:copy>
<xsl:apply-templates select="*[not(. castable as xs:integer)]"/>
<xsl:apply-templates select="*[. castable as xs:integer]">
<xsl:sort select="." order="descending" data-type="number"/>
</xsl:apply-templates>
</xsl:copy>
</xsl:template>
And add:
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="#all"
to transform tag.
But I still can't see anything, which can be called the specific value.

Related

How do I rename an XML element with the value of its first attribute using XSLT?

I am new to XSLT and have XML structures that look like this:
<Loop LoopId="1000A" Name="SUBMITTER NAME">
.... a bunch of sub-elements, etc.
</Loop>
I am trying to write an XSLT that will convert them all to this:
(concatenate the value of the LoopId attribute to its parent element name)
<Loop1000A LoopId="1000A" Name="SUBMITTER NAME">
.... a bunch of sub-elements, etc.
</Loop1000A>
I have a style sheet that gets me almost all of the way there, but it is getting rid of the attribute LoopId and I don't know why - the style sheet below produces this result:
<Loop1000A Name="SUBMITTER NAME">
.... a bunch of sub-elements, etc.
</Loop1000A>
Is there a way to modify it so I keep the LoopId attribute?
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="#LoopId"/>
<xsl:template match="*[#LoopId]">
<xsl:variable name="vRep" select="concat('Loop',#LoopId)"/>
<xsl:element name="{$vRep}">
<xsl:apply-templates select="node()|#*"/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
Thanks
Remove the template <xsl:template match="#LoopId"/> as that way you remove the LoopId attribute.
Change:
<xsl:element name="concat('Loop', #LoopId)">
to:
<xsl:element name="{concat('Loop', #LoopId)}">
See:
https://www.w3.org/TR/xslt/#attribute-value-templates

Trying to find the following two rows in XBRL instance document

I am trying to find an xslt solution to the following problem I have.
I want to find a set of 3 subsequent rows that share the node name and an attribute but have a different values. The first row in the input contains an identifier, the second and third row contain values from a source system. I want to find the sets where the second and third row have different values.
E.g.
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">78923</eba7:mi235>
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">1111</eba7:mi235>
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">2222</eba7:mi235>
There might also be sets of rows with only an identifier, a set of a row with an identifier and only one row with a value from the source system or a set of rows where the second and third row have the same value.
E.g.
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x24-x195-x10-x4">78748</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x24-x195-x10-x4">0</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">78804</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">12345</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">12345</eba7:mi310>
These I don't want to find in the output.
The output I want to create is
<eba7:mi235 id="78923" value1="1111" value2="2222" />
The structure of the input is such that the rows are always ordered like this. So I tried to access them using position, but that didn't work.
Could anybody point me in the right direction? Is using position the right way?
I have attached an file with the input data below
Thanks.
Paul.
<?xml version="1.0" encoding="utf-8"?>
<xbrl xml:lang="en" xmlns="http://www.xbrl.org/2003/instance" xmlns:eba7="http://www.eba.europa.eu/xbrl/crr/dict/met" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
<link:schemaRef xlink:type="simple" xlink:href="http://www.eba.europa.eu/eu/fr/xbrl/crr/fws/corep/its-2013-02/2014-07-31/mod/corep_con.xsd" />
<context id="I-2014-E">
<entity>
<identifier scheme="http://www.dnb.nl/id">578</identifier>
</entity>
<period>
<instant>2014-12-31</instant>
</period>
</context>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x24-x195-x10-x4">78748</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x24-x195-x10-x4">0</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">78804</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">12345</eba7:mi310>
<eba7:mi310 contextRef="I-2014-E-dim-x42-x9-x25-x195-x10-x4">12345</eba7:mi310>
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">78923</eba7:mi235>
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">1111</eba7:mi235>
<eba7:mi235 contextRef="I-2014-E-dim-x43-x9-x156-x51-x14">2222</eba7:mi235>
</xbrl>
I don't think the question is defined well enough; it can be interpreted in several ways.
If we assume that you want to:
Group all the given elements based on both the tag name and the #contextRef value being the same; with the mutual position of the elements being irrelevant for this purpose;
Count the distinct values in each group; if there are three or more, write an element with the common tag name to the output, and add a numbered attribute for each distinct value in this group;
then it would be probably best to do something like:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xbrli="http://www.xbrl.org/2003/instance"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/>
<xsl:key name="k1" match="*" use="concat(name(), '|', #contextRef)"/>
<xsl:key name="k2" match="*" use="concat(name(), '|', #contextRef, '|', .)"/>
<xsl:template match="/xbrli:xbrl">
<xsl:copy>
<xsl:for-each select="*[count(.|key('k1', concat(name(), '|', #contextRef))[1])=1]">
<xsl:variable name="distinct-values" select="key('k1', concat(name(), '|', #contextRef)) [count(.|key('k2', concat(name(), '|', #contextRef, '|', .))[1])=1]"/>
<xsl:if test="count($distinct-values) >= 3">
<xsl:copy>
<xsl:for-each select="$distinct-values">
<xsl:attribute name="value{position()}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:for-each>
</xsl:copy>
</xsl:if>
</xsl:for-each>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Applied to the following well-formed test input:
<xbrl xmlns="http://www.xbrl.org/2003/instance" xmlns:eba7="http://www.eba.europa.eu/xbrl/crr/dict/met">
<eba7:a contextRef="x">11</eba7:a>
<eba7:a contextRef="x">12</eba7:a>
<eba7:a contextRef="y">21</eba7:a>
<eba7:a contextRef="y">22</eba7:a>
<eba7:a contextRef="y">23</eba7:a>
<eba7:b contextRef="x">31</eba7:b>
<eba7:b contextRef="x">32</eba7:b>
<eba7:b contextRef="x">33</eba7:b>
<eba7:b contextRef="x">33</eba7:b>
<eba7:c contextRef="x">41</eba7:c>
<eba7:c contextRef="x">41</eba7:c>
<eba7:c contextRef="x">42</eba7:c>
<eba7:c contextRef="x">42</eba7:c>
</xbrl>
the result will be:
<?xml version="1.0" encoding="utf-8"?>
<xbrl xmlns="http://www.xbrl.org/2003/instance" xmlns:eba7="http://www.eba.europa.eu/xbrl/crr/dict/met">
<eba7:a value1="21" value2="22" value3="23"/>
<eba7:b value1="31" value2="32" value3="33"/>
</xbrl>
Note:
You must be familiar with the Muenchian grouping method in order to understand this;
Numbered attributes are not good XML practice. I would suggest you (or the powers that be) reconsider this requirement.
Would this stylesheet solve your problem:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xbrli="http://www.xbrl.org/2003/instance" version="1.0">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes" />
<xsl:strip-space elements="*"/>
<xsl:key name="elements" match="*" use="#contextRef"/>
<xsl:template match="/xbrli:xbrl">
<xsl:copy>
<xsl:apply-templates select="*[#contextRef
and count(key('elements', #contextRef)) = 3
and key('elements', #contextRef)[2] != key('elements', #contextRef)[3]
and count(. | key('elements', #contextRef)[1]) = 1]"/>
</xsl:copy>
</xsl:template>
<xsl:template match="*">
<xsl:copy>
<xsl:attribute name="id">
<xsl:value-of select="."/>
</xsl:attribute>
<xsl:attribute name="value1">
<xsl:value-of select="key('elements', #contextRef)[2]"/>
</xsl:attribute>
<xsl:attribute name="value2">
<xsl:value-of select="key('elements', #contextRef)[3]"/>
</xsl:attribute>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Here, a key is declared to match elements with #contextRef being the identifier. The first template applies templates to the first elements with unique #contextRef(and also those which match other conditions like total elements with that #contextRef must be 3, and the second and thrid elements must not have the same value).
The next template matches these elements(from the first template), and creates the further output.

XSLT correct approach in writing XPath expression used in multiple condition checking and displaying value

Considering this XML,
XML:
<?xml version="1.0" encoding="UTF-8"?>
<items>
<book>
<title>doublebell</title>
<count>available</count>
</book>
<phone>
<brand>nokia</brand>
<model></model>
</phone>
</items>
Mapping Criteria while writing XSLT:
show the newbook/newtitle only if a value is present in input.
show the newbook/newcount only if a value is present in input.
show the newphone/newbrand only if a value is present in input.
show the newphone/newmodel only if a value is present in input.
XSLT:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8"
indent="yes" />
<xsl:variable name="book" select="items/book" />
<xsl:variable name="phone" select="items/phone" />
<xsl:template match="/">
<items>
<newbook>
<xsl:if test="$book/title!=''">
<newtitle>
<xsl:value-of select="$book/title" />
</newtitle>
</xsl:if>
<xsl:if test="$book/count!=''">
<newcount>
<xsl:value-of select="$book/count" />
</newcount>
</xsl:if>
</newbook>
<xsl:if test="$phone/brand!='' or $phone/model!=''"> <!-- not sure if this condition is required for the above mapping criteria -->
<newphone>
<xsl:if test="$phone/brand!=''">
<newbrand>
<xsl:value-of select="$phone/brand" />
</newbrand>
</xsl:if>
<xsl:if test="$phone/model!=''">
<newmodel>
<xsl:value-of select="$phone/model" />
</newmodel>
</xsl:if>
</newphone>
</xsl:if>
</items>
</xsl:template>
</xsl:stylesheet>
This is my concern:- In my actual XSLT, I have almost 70 conditions like
this, and everytime the XPath search is made twice [or thrice.. ] for
each condition [ for eg: <xsl:if test="$phone/brand!=''"> and <xsl:value-of select="$phone/brand" /> and outer if condition].
Is this much performance overhead? I don't feel it when I ran my application.
I like to hear from experienced people if this is correct way of writing the XSLT. Do I need to save the path in a variable and reuse it as done for $book
and $phone ? In such a case there will be 70+variables just to hold this.
You can approach this quite differently using templates. If you define a template that matches any element whose content is empty and does nothing:
<xsl:template match="*[. = '']" />
or possibly use normalize-space() if you want to consider elements to be empty if they contain only whitespace
<xsl:template match="*[not(normalize-space())]" />
Now with this in place add templates for the elements you are interested in
<xsl:template match="book">
<newbook><xsl:apply-templates /></newbook>
</xsl:template>
<xsl:template match="title">
<newtitle><xsl:apply-templates /></newtitle>
</xsl:template>
and so on. Now the book template will create a newbook element and go on to process its children. When it gets to the title it will have two different templates to choose from and will pick the "most specific" match. If the title is empty then the *[. = ''] template will win and nothing will be output, only if the title is non-empty will it create a newtitle element.
This way you let the template matcher do most of the work for you, you don't need any explicit conditional checks using xsl:if.
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8"
indent="yes" />
<xsl:template match="/">
<items><xsl:apply-templates select="items/*" /></items>
</xsl:template>
<!-- ignore empty elements -->
<xsl:template match="*[not(normalize-space())]" />
<xsl:template match="book">
<newbook><xsl:apply-templates /></newbook>
</xsl:template>
<xsl:template match="title">
<newtitle><xsl:apply-templates /></newtitle>
</xsl:template>
<!-- and so on with similar templates for the other elements -->
</xsl:stylesheet>
Building on Ian's answer, you can also make a generic template that will create the "new" elements for you without having to specify each one individually. That would look like the below:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" />
<xsl:template match="/">
<items><xsl:apply-templates select="items/*" /></items>
</xsl:template>
<xsl:template match="*[not(normalize-space())]" />
<xsl:template match="*">
<xsl:element name="{concat('new',name())}">
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
That last template just rebuilds the element by concatenating the word "new" to the front of it.

Converting XML format using XSLT

My requirement is to convert the following array
<array>
<value>755</value>
<value>5861</value>
<value>4328</value>
</array>
to this array.
<array>
<int>755</int>
<int>5861</int>
<int>4328</int>
</array>
Following is my XSLT code to do the transformation & it works. Is it the correct way because in one post I saw the use of "identity template". but I haven't used it.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/array">
<xsl:element name="array">
<xsl:for-each select="value">
<xsl:element name="int">
<xsl:value-of select="." />
</xsl:element>
</xsl:for-each>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
Your current method works. It is more of a "pull" style stylesheet. The "push" style uses apply-templates.
You could shorten it a bit by using element literals, which makes it a little easier to read:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/array">
<array>
<xsl:for-each select="value">
<int>
<xsl:value-of select="." />
</int>
</xsl:for-each>
</array>
</xsl:template>
</xsl:stylesheet>
A solution using the identity template and a custom template for the value element:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="xml" indent="yes"/>
<!--identity template, which copies every attribute and
node(element, text, comment, and processing instruction)
that it matches and then applies templates to all of it's
attributes and child nodes (if there are any) -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<!--Specialized template that matches the value element.
Because it is more specific than the identity template above it has
a higher priority and will match when the value element is encountered.
It creates an int element and then applies templates to any attributes
and child nodes of the value element -->
<xsl:template match="value">
<int>
<xsl:apply-templates select="#*|node()"/>
</int>
</xsl:template>
</xsl:stylesheet>
You can do:
<xsl:template match="/array">
<array>
<xsl:for-each select="value">
<int>
<xsl:value-of select="." />
</int>
</xsl:for-each>
</array>
</xsl:template>
Here is a quote from the accepted answer of your link:
XSL cannot replace anything. The best you can do is to copy the parts you want to keep, then output the parts you want to change instead of the parts you don't want to keep.
That is where the identity template comes into play: it copies everything not targetted by another matching template. The upshot is, that if your base XML contains other content than just the array, then you should also include the identity template in your xslt. But if you are sure that your xml will contain no other content, then you don't need it.

Doing a double-pass in XSL?

Is it possible to store the output of an XSL transformation in some sort of variable and then perform an additional transformation on the variable's contents? (All in one XSL file)
(XSLT-2.0 Preferred)
XSLT 2.0 Solution :
<xsl:variable name="firstPassResult">
<xsl:apply-templates select="/" mode="firstPass"/>
</xsl:variable>
<xsl:template match="/">
<xsl:apply-templates select="$firstPassResult" mode="secondPass"/>
</xsl:template>
The trick here, is to use mode="firstPassResult" for the first pass while all the templates for the sedond pass should have mode="secondPass".
Edit:
Example :
<root>
<a>Init</a>
</root>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:variable name="firstPassResult">
<xsl:apply-templates select="/" mode="firstPass"/>
</xsl:variable>
<xsl:template match="/" mode="firstPass">
<test>
<firstPass>
<xsl:value-of select="root/a"/>
</firstPass>
</test>
</xsl:template>
<xsl:template match="/">
<xsl:apply-templates select="$firstPassResult" mode="secondPass"/>
</xsl:template>
<xsl:template match="/" mode="secondPass">
<xsl:message terminate="no">
<xsl:copy-of select="."/>
</xsl:message>
</xsl:template>
</xsl:stylesheet>
Output :
[xslt] <test><firstPass>Init</firstPass></test>
So the first pass creates some elements with the content of root/a and the second one prints the created elements to std out. Hopefully this is enough to get you going.
Yes, with XSLT 2.0 it is easy. With XSLT 1.0 you can of course also use modes and store a temporary result in a variable the same way as in XSLT 2.0 but the variable is then a result tree fragment, to be able to process it further with apply-templates you need to use an extension function like exsl:node-set on the variable.