How to know the order of the xslt operators? - xslt

System.Xml 'xsl:choose' cannot be a child of the 'xsl:call-template' element.
How do I know the order of such operators in xslt ?

XSLT is a publically documented W3C standard so check the relevant documents, for XSLT 3 at https://www.w3.org/TR/xslt-30/#element-call-template is saying e.g. <!-- Content: xsl:with-param* --> which explains the allowed content is a (possibly empty) sequence of xsl:with-param.
The spec also contains an XSD schema so any XML editor using that schema should assist you in showing the possible, allowed elements.

As well as the spec, for quick reference, you might like the MulberryTech reference cards at http://www.mulberrytech.com/quickref/
Alternatively, there are some good books on XSLT ;-)
If you're trying to supply a parameter conditionally, then instead of
<xsl:call-template
<xsl:choose
<xsl:with-param
use
<xsl:call-template
<xsl:with-param
<xsl:choose

Related

xslt - how to convert iso Alpha 2 code to Country name

I have an xml which has the two char alpha code which need to be converted into a fully qualified country name. For example, DE should become Germany. I understand that xslt templates can be used to keep the list within xslt to fetch the relevant names however I am not happy with that design and am looking for an xslt function (or something similar) which will avoid any future maintenance of the mapping. please let me know your thought on this. thanks.
Perhaps call a web service e.g. with XSLT 3 you can process the JSON returned from most REST APIs
<xsl:template match="code">
<country>{json-doc('https://restcountries.com/v2/alpha/' || .)?name}</country>
</xsl:template>
For XSLT 2 you could use a service returning an XML format e.g.
<xsl:template match="code">
<country>
<xsl:value-of
select="doc(concat('https://api.worldbank.org/v2/country/', .))/countries/country/name"
xpath-default-namespace="http://www.worldbank.org"/>
</country>
</xsl:template>

Replacing NameSpaces one from Another using XSLT

I have one XML input file in which I am getting some Namespaces which I wanted to replace from another using XSLT. Actually I am new XSLT so not able to find proper solution. below is the XML input payload and Output payload which I want. Could anyone help me on that.
Input Payload:
<ns:createOrderResponse xmlns:ns="http://services.oms.ecom.ecc.com"><ns:return type="com.ecc.ecom.oms.beans.xsd.CreateOrderResponse"><ns:omsGeneratedOrderId xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" /><ns:responseCode>99</ns:responseCode><ns:responseDesc>INVALID ORDER</ns:responseDesc><ns:sellerSiteId>10196</ns:sellerSiteId><ns:serverProcElapsedTime>8</ns:serverProcElapsedTime><ns:siteGeneratedOrderId xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" /><ns:subResponse><responseCode xmlns="http://beans.oms.ecom.ecc.com/xsd">1144</responseCode><responseDescription xmlns="http://beans.oms.ecom.ecc.com/xsd">Order Total mismatch</responseDescription></ns:subResponse><ns:subResponse><responseCode xmlns="http://beans.oms.ecom.ecc.com/xsd">1147</responseCode><responseDescription xmlns="http://beans.oms.ecom.ecc.com/xsd">Order Grand Total and sum of OrderItem Grand Total mismatch</responseDescription></ns:subResponse><ns:transactionNumber>0717299145</ns:transactionNumber></ns:return></ns:createOrderResponse>
Desired Output:
<ns:createOrderResponse xmlns:ns="http://services.oms.ecom.ecc.com"><ns:return type="com.ecc.ecom.oms.beans.xsd.CreateOrderResponse"><ns:omsGeneratedOrderId xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" /><ns:responseCode>99</ns:responseCode><ns:responseDesc>INVALID ORDER</ns:responseDesc><ns:sellerSiteId>10196</ns:sellerSiteId><ns:serverProcElapsedTime>8</ns:serverProcElapsedTime><ns:siteGeneratedOrderId xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" /><ns:subResponse><responseCode xmlns="http://services.oms.ecom.ecc.com">1144</responseCode><responseDescription xmlns="http://services.oms.ecom.ecc.com">Order Total mismatch</responseDescription></ns:subResponse><ns:subResponse><responseCode xmlns="http://services.oms.ecom.ecc.com">1147</responseCode><responseDescription xmlns="http://services.oms.ecom.ecc.com">Order Grand Total and sum of OrderItem Grand Total mismatch</responseDescription></ns:subResponse><ns:transactionNumber>0717299145</ns:transactionNumber></ns:return></ns:createOrderResponse>
Basically I wanted to replace:
Namespace :http://beans.oms.ecom.shc.com/xsd
from
Namespace :http://services.oms.ecom.ecc.com
CAVEAT: The following is untested but demonstrates the ideas.
If you know which specific elements and attributes to expect, that's relatively easy -- it's the same as any other "when you see this element, output this other element instead" template, recursing to cover the whole document. Start with the identity stylesheet and add appropriate templates of the form:
<xsl:template match="wrongnamespace:fred"
xmlns:wrongnamespace="http://services.oms.ecom.ecc.com">
<rightnamespace:fred xmlns:rightnamespace="http://beans.oms.ecom.shc.com/xsd">
<xsl:apply-templates/>
</rightnamespace:fred>
</xsl:template>
and (for attributes)
<xsl:template match="#wrongnamespace:george"
xmlns:wrongnamespace="http://services.oms.ecom.ecc.com">
<xsl:attribute name="ns:george" value="."
namespace="http://beans.oms.ecom.shc.com/xsd"/>
</xsl:template>
... and so on.
If you don't know what elements or attributes to expect, this becomes uglier. In XSLT 1.0 and XPath 1.0 there's no easy way to say "any element node" (though I believe that was fixed in the 2.0 version of these specs). Sticking with 1.0 because it's more widely supported, the easiest solution is to use priorities: have a higher-priority template that catches the attributes, then have another template which handles other namespaced nodes (which would therefore be elements).
<xsl:template match="#*[namespace-uri(.)="http://services.oms.ecom.ecc.com"
priority="1">
<xsl:attribute name="concat('ns:',localname(.))" value="."
namespace="http://beans.oms.ecom.shc.com/xsd"/>
</xsl:template>
<xsl:template match="node()[namespace-uri(.)="http://services.oms.ecom.ecc.com"
priority="1">
<xsl:element name="concat('ns:',localname(.))"
namespace="http://beans.oms.ecom.shc.com/xsd">
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
Again, adding these to the canonical identity stylesheet will do what you need; it'll catch and change these two cases while copying everything else unaltered.
CAVEAT: THIS WILL NOT CHANGE URIS APPEARING IN STRINGS. You could add a template which looks for text() nodes containing the old URI and outputs the new one instead; I'm leaving that as an exercise for the reader.
CAVEAT: THIS WILL NOT CHANGE NAMESPACE NODES. You may wind up with leftover declarations of the old prefix and namespace. Another template could be added to clean that up; this too is left as an exercise for the reader.
That should give you enough to get you started. Have fun. Programming in XSLT does require learning to think in terms of rules and replacements rather than procedures, but when you get used to that it can be a very expressive tool.
(Standard plug: If you want an off-the-shelf tested solution, you can probably find one on Dave Pawson's XSL FAQ website. That's a resource you really need to be aware of if working in XSLT; it'll save you a lot of work, and it has some solutions that are very clever and very non-obvious.)

XSLT - Passing params from one template to another

I am an open-source xslt package for date format conversion.
Link # http://xsltsl.sourceforge.net/
And this is how I call in order to do my date format conversion and obtain date in the following format - April 4, 2011.
<xsl:variable name="date.format">%B %d, %Y</xsl:variable>
<xsl:variable name="someDate">
<xsl:call-template name="dt:format-date-time">
<xsl:with-param name="xsd-date-time" select="//someDate"/>
<xsl:with-param name="format" select="$date.format"/>
</xsl:call-template>
</xsl:variable>
I retrieve the result by call - <xsl:value-of select="$checkindate"/>
I would like to update my above code to pass in an additional parameter which is language and be able to get translated values with no luck.
Any help!
I would like to update my above code to pass in an additional
parameter which is language and be able to get translated values with
no luck.
The dt:format-date-time template isn't intended to accept any other parameters than it does at present.
There is more than one way to achieve the task specified above:
Modify the code of the dt:format-date-time template by adding an `xsl:param name="lang" and the corresponding code to process the new parameter.
Add a new template (say dt:format-date-time-NL). In this template have an xsl:param name="lang" and, if appropriate, call the existingdt:format-date-time` template.
I recommend the second approach as a positive example of reusing code and achieving flexibility. XSLT provides clean support for this writing style with the standard xsl:import and xsl:include directives.
Note also, that directly editing someone else's code will not always be possible, desirable or ethical. Even if alowed this can lead to multitude of incompatible "versions" (more exactly "mutations") of the original code with all bad consequences

Actually XSLT Lookup (Store variables during loop and use in it another template)

This question actually asks something quite different. See the comments to #Tomalak's answer to understand what the OP really wanted. :(
Is there a way to store a variable/param during a for-each loop in a sort of array, and use it in another template, namely <xsl:template match="Foundation.Core.Classifier.feature">.
All the classname values that appear during the for-each should be stored. How would you implement that in XSLT? Here's my current code.
<xsl:for-each select="Foundation.Core.Class">
<xsl:for-each select="Foundation.Core.ModelElement.name">
<xsl:param name="classname">
<xsl:value-of select="Foundation.Core.ModelElement.name"/>
</xsl:param>
</xsl:for-each>
<xsl:apply-templates select="Foundation.Core.Classifier.feature" />
</xsl:for-each>
Here's the template in which the classname parameters should be used.
<xsl:template match="Foundation.Core.Classifier.feature">
<xsl:for-each select="Foundation.Core.Attribute">
<owl:DatatypeProperty rdf:ID="{Foundation.Core.ModelElement.name}">
<rdfs:domain rdf:resource="$classname" />
</owl:DatatypeProperty>
</xsl:for-each>
</xsl:template>
The input file can be found at http://krisvandenbergh.be/uml_pricing.xml
No, it is not possible to store a variable in a for-each loop and use it later.
This is because variables are write-once in XSLT (once set they are immutable) and they are strictly scoped within their parent element. Once processing leaves the for-each loop, the variable is gone.
XSLT does not work as an imperative programming language, but that's what you seem to be trying here. You don't need <xsl:for-each> in 98% of all cases and should not use it because it clogs your view of how XSLT works. To improve your XSLT code, get rid of all <xsl:for-each> loops you have (all of them, I mean it) and use templates instead:
<xsl:template match="Foundation.Core.Class">
<xsl:apply-templates select="
Foundation.Core.Classifier.feature/Foundation.Core.Attribute
" />
</xsl:template>
<xsl:template match="Foundation.Core.Attribute">
<owl:DatatypeProperty rdf:ID="{Foundation.Core.ModelElement.name}">
<rdfs:domain rdf:resource="{
ancestor::Foundation.Core.Class[1]/Foundation.Core.ModelElement.name[1]
}" />
</owl:DatatypeProperty>
</xsl:template>
(I'm not sure if the above is what you actually want, your question is rather ambiguous.)
Note the use of the XPath ancestor axis to refer to an element higher in the hierarchy (you seem to want the <Foundation.Core.ModelElement.name> of the parent class).
PS: Your XML is incredibly bloated and strongly redundant due to structured element names. Structure should come from... well... structure, not from elements like <Foundation.Core.Classifier.feature>. I'm not sure if you can do anything about it, though.
Addition:
To solve your xmi.id / xmi.idref problem, the best way is to use an XSL key:
<!-- this indexes all elements by their #xmi.id attribute -->
<xsl:key name="kElementByIdref" match="*[#xmi.id]" use="#xmi.id" />
<!-- now you can do this -->
<xsl:template match="Foundation.Core.DataType">
<dataTypeName>
<!-- pull out the corresponding element from the key, output its value -->
<xsl:value-of select="key('kElementByIdref', #xmi.idref)" />
</dataTypeName>
</xsl:template>
To better understand how keys work internally, you can read this answer I gave earlier. Don't bother too much with the question, just read the lower part of my answer, I explained keys in terms of JavaScript.
Ok, I now understand why for-each is not always needed. Consider the code below.
<Foundation.Core.DataType xmi.id="UID71848B1D-2741-447E-BD3F-BD606B7FD29E">
<Foundation.Core.ModelElement.name>int</Foundation.Core.ModelElement.name>
</Foundation.Core.DataType>
It has an id UID71848B1D-2741-447E-BD3F-BD606B7FD29E
Way elsewhere I have the following.
<Foundation.Core.StructuralFeature.type>
<Foundation.Core.DataType xmi.idref="UID71848B1D-2741-447E-BD3F-BD606B7FD29E"/>
</Foundation.Core.StructuralFeature.type>
As you can see, both codes have the same ID. Now I want to output "int", everytime this ID appears somewhere in the document. So basically idref="UID71848B1D-2741-447E-BD3F-BD606B7FD29" should be replaced by int, which can be easily derived from the Foundation.Core.ModelElement.name element.
Above is the main reason why I would like to store it in a variable. I don't get it how this can be dealt with using XSLT. If someone could elaborate on this, I hope there exists some kind of pattern to solve such a problem, since I need it quite often. What would be a good approach?
I understand this is maybe a bit off-topic, but I am willing to ask it in this thread anyway since this problem is very close to it.

Random Items in XSLT

I'm customizing a Google Search appliance, which uses XSLT to present results to the user. Our design calls for one of several images to be included randomly on the results page. Is there a way to use randomness in XSLT? (Pseudo-randomness is just fine for this application.)
Calling random templates would be fine, as would just being able to generate a random number and branch based on that.
You can generate in pure XSLT sequences of random numbers and also random permutations of the numbers in [1 .. N].
Just use the FXSL library (written in pure XSLT) for this.
This article explains the templates to use and has complete examples:
"Casting the Dice with FXSL: Random Number Generation Functions in XSLT".
Depending on your platform XSL allows inject of user code like C#. I don't recommend this. Better, I would have your XSL accept a parameter and whatever is generating your XML payload or XSLT and can also generate the random number, setting the parameter. I've done this exactly using this approach except the data came from Bing, not G.
If you use a Java based XSLT engine, this will allow you to make calls to any static method within the Java libraries, such as java.lang.Math.random(). Here is the syntax...
<?xml version='1.0'?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:math="java.lang.Math"
version='1.1'>
<xsl:template match="/">
<xsl:variable name="myRandom" select="math:random()"/>
<xsl:value-of select="$myRandom"/>
</xsl:template>
</xsl:stylesheet>
If you are not averse to including libraries, there are many available such as random:random-sequence from EXSLT
If you are doing this for anything Microsoft, I found that using XSLT's function ddwrt:Random works.
I use the following to create the random number
<xsl:variable name="RowCount" select="count($Rows)" />
<xsl:variable name="RandomNumber" select="ddwrt:Random(1, $RowCount)" />
and the following to present
<xsl:for-each select="$Rows[position() = $RandomNumber]">
<xsl:value-of select="#Title" /></xsl:for-each>