I'm importing data from an xml feed built like this:
<?xml version="1.0" encoding="utf-8"?>
<channel>
<item>
<a>some data</a>
<b>some data</b>
<c>some data</c>
</item>
<item>
<c>some data</c>
<d>some data</d>
<b>some data</b>
</item>
</channel>
Only some data is important to me -- in the example above, let's say the data in elements <b> and <c>.
The next item might contain a tag named <g>, <e>, or why not <p>. Other tag names than those I'm interested in are unknown to me and may occur at any time.
Is there any way for me, with xsd, to validate that the elements I'm interested in (<b> and <c>) exists within all <item>s?
Thanks!
If you have an xsd you could explain that the element is mandatory.
e.g
<xs:complexType name="item">
<xs:all>
<xs:element name="a" type="xs:string" minOccurs="0"/>
<xs:element name="b" type="xs:string" minOccurs="1"/>
<xs:element name="c" type="xs:string" minOccurs="1"/>
<xs:element name="d" type="xs:string" minOccurs="0"/>
</xs:all>
</xs:complexType>
In this way you should only apply an xsd validation.
<xs:all> indipendent of order
minOccurs="1" mandatory element
I hope I've given you all the answers about your question.
Related
Is it valid to have two xsd's import each other?
For example, the first one is 'MyService.xsd=48 and it looks like:
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema xmlns:tns="http://documentation" xmlns:ns1="http://documentHistory" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified" version="1.0" targetNamespace="http://documentation">
<xs:import namespace="http://documentHistory" schemaLocation="MyService.xsd=49" />
<xs:complexType name="item">
<xs:sequence>
<xs:element name="internalId" type="xs:long" minOccurs="0" />
<xs:element name="readOnly" type="xs:boolean" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="data">
<xs:sequence>
<xs:element name="histories" type="ns1:history" nillable="true" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:schema>
The second xsd is MyService.xsd=49 and looks like:
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema xmlns:tns="http://documentHistory" xmlns:ns1="http://documentation" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified" version="1.0" targetNamespace="http://documentHistory">
<xs:import namespace="http://documentation" schemaLocation="MyService.xsd=48" />
<xs:complexType name="history">
<xs:complexContent>
<xs:extension base="ns1:item">
<xs:sequence>
<xs:element name="dateReceived" type="xs:dateTime" minOccurs="0" />
<xs:element name="dateSent" type="xs:dateTime" minOccurs="0" />
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:schema>
Notice that the first one imports the second one and the second one imports the first one. I have an issue that I'm trying to track down and I don't know if this is part of the problem or not. The issue I'm trying to solve has to do with TCL not seeming to parse my wsdl correctly. After TCL parses the wsdl into a dict, the 'history' object doesn't have the properties from the 'item' object, even though the xsd shows that history should extend from item.
The question is: is it valid for two xsd's to import each other or does this look like a problem?
Also, I already looked at this post XSD circular import but found the answer difficult to understand. Any help / insight would be greatly appreciated. Thanks!
I wish to create a repeating same named element with two attributes for which the values of each are tied to each other. i.e.
<anElement id="R1" description="Some definition for R1"/>
<anElement id="R2" description="Some definition for R2"/>
Ideally I would define "groups" of id and description attributes together and reference one of the groups for each instance of anElement element.
<complexType name="RElements">
<choice>
<element name="anElement" type="R1Group"/>
<element name="anElement" type="R2Group"/>
</choice>
</complexType>
<complexType name="RElementsType">
<sequence>
<element ref="RElements" minOccurs="1" maxOccurs="unbounded"/>
</sequence>
</complexType>
But Choice doesn't allow multiples of the same element name. I see discussions about how to have multiple elements of the same name but none allow additional attributes let alone having attributes tied to each other. The only way that I can get close is by having a different named element based on the id. i.e.
<R1 id="R1" description="Some definition for R1"/>
<R2 id="R2" description="Some definition for R2"/>
Any suggestions?
You need to provide more information.
Basically to achieve the XML you have provided a simple schema like this would suffice.
<?xml version="1.0" encoding="utf-8" ?>
<!--Created with Liquid XML 2015 Developer Bundle Edition 13.0.3.5737 (http://www.liquid-technologies.com)-->
<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="RootElement">
<xs:complexType>
<xs:sequence>
<xs:element name="anElement" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:attribute name="id" type="xs:string" />
<xs:attribute name="descritpion" type="xs:string" />
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
However you mention that the attribute values id and description are linked, you may be able to constrain these, but you need to provide more info. Also I'm not sure why you are looking at choices? Its difficult to see what your attempting give you only provide snippets of the schema
To include the constraints described in later comments the following schema would allow this, but force a change in the XML structure
<AnElement id="E1"> Exterminator serial <ref id="E1"/> </AnElement>
<?xml version="1.0" encoding="utf-8" ?>
<!--Created with Liquid XML 2015 Developer Bundle Edition 13.0.0.5686 (http://www.liquid-technologies.com)-->
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="RootElement">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:element name="AnElement">
<xs:complexType mixed="true">
<xs:sequence>
<xs:element name="ref" minOccurs="0">
<xs:complexType>
<xs:attribute name="id" type="xs:string" use="optional" />
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="id" type="xs:string" use="optional" />
</xs:complexType>
<xs:key name="IDVal">
<xs:selector xpath="." />
<xs:field xpath="#id" />
</xs:key>
<xs:keyref name="IdRef" refer="IDVal">
<xs:selector xpath="ref" />
<xs:field xpath="#id" />
</xs:keyref>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
What I'm trying to do is, declare an parent element called "data", which are having 10 sub element of these one element are conditional.
My XSD is:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" elementFormDefault="qualified" attributeFormDefault="unqualified" vc:minVersion="1.1">
<xs:element name="data" >
<xs:complexType>
<xs:sequence>
<xs:element name="sub_data" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:all >
<xs:element ref="A"/>
<xs:element ref="B" minOccurs="0" maxOccurs="1"/>
<xs:element ref="C"/>
<xs:element ref="D"/>
<xs:element ref="E"/>
<xs:element ref="F"/>
<xs:element ref="G"/>
<xs:element ref="H"/>
<xs:element ref="I"/>
<xs:element ref="J"/>
<xs:element ref="K"/>
<xs:element ref="L"/>
<xs:element ref="M"/>
<xs:element ref="N"/>
<xs:element ref="element_group"/>
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="status"/>
</xs:complexType>
</xs:element>
<xs:element name="O" type="xs:string" substitutionGroup="element_group">
<xs:element name="P" type="xs:string" substitutionGroup="element_group">
<xs:element name="Q" type="xs:string" substitutionGroup="element_group">
</xs:schema>
Requirement is:
All element from A to N are appearing in any order.
Element P,Q and R is also part of data but only one element appear from among 3. Order is also any.
More important I have cover 1st and 2nd point but I want one more restriction is that only and only four element will be become the part of <data> that means element count from <A> to <Q> is exact four,
Combination can any of them from <A> to <Q> but final count is only four, please help me.
Now currently i am unable to set maxOccures in <all> , it not compiling the xsd after setting maxOccures.
The simplest way to handle this is probably to use XSD 1.1 and use an assertion on the parent to specify that there must be exactly (or at most) four children. You will also need to make each child of the all-group optional, since thirteen of them will not appear.
The best way might be to redesign your XML to work better with your schema language instead of fighting it. It's hard to give advice on that, though, since your example is abstract enough to make it unclear why you are imposing the requirements you mention.
This has been driving me mad for hours. I've read every relevant XSD question on SO and the rest of the Internet it seems and still the answer eludes me.
I need an XML schema that requires at least one of list of elements be present, but each element may appear only 0 or 1 times.
This is similar to this question:
XML schema construct for "any one or more of these elements but must be at least one"
but I was unable to constrain the upper limit: I am apparently using maxOccursincorrectly.
Here's where I left off with my schema:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:complexType name="Selects">
<xs:sequence minOccurs="2" maxOccurs="4">
<xs:choice>
<xs:element name="aaa" minOccurs="1" maxOccurs="1"/>
<xs:element name="bbb" minOccurs="1" maxOccurs="1"/>
<xs:element name="ccc" minOccurs="1" maxOccurs="1"/>
<xs:element name="ddd" minOccurs="1" maxOccurs="1"/>
</xs:choice>
</xs:sequence>
</xs:complexType>
<xs:element name="baseElement">
<xs:complexType>
<xs:sequence>
<xs:element name="MyChoice" type="Selects"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
I've tried the minOccurs and maxOccurs on the choice and the element with no luck. Here is XML that validates, though I don't want it to:
<?xml version="1.0" encoding="UTF-8"?>
<baseElement xsi:noNamespaceSchemaLocation="myTest.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<MyChoice>
<ddd/>
<ddd/>
</MyChoice>
</baseElement>
Here's an example of what I would like, if possible:
<?xml version="1.0" encoding="UTF-8"?>
<baseElement xsi:noNamespaceSchemaLocation="myTest.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<MyChoice>
<ddd/>
<aaa/>
<ccc/>
</MyChoice>
</baseElement>
I would like it to complain about the multiple ddd elements but allow any or all of the others in any order. I get an error if I only have one element under MyChoice so at least something works.
What am I doing wrong? How do I prevent multiple of the same element from validating?
UPDATE
This was my solution (from comments on answer below):
Actually, xs:all did the trick. I swapped the choice for all and added minOccurs="0" maxOccurs="1" to each element. With xs:all, minOccurs must be either 0 or 1 and maxOccurs must be 1. Thanks for your help - I'm good to go now!
Just move the <xs:sequence minOccurs="2" maxOccurs="4"> from around the choice to the point where you want to use it further down. (you can also remove the min/max occurs = 1 as this is what xs:choice does)
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:complexType name="Selects">
<xs:choice>
<xs:element name="aaa" />
<xs:element name="bbb" />
<xs:element name="ccc" />
<xs:element name="ddd" />
</xs:choice>
</xs:complexType>
<xs:element name="baseElement">
<xs:complexType>
<xs:sequence minOccurs="2" maxOccurs="4">
<xs:element name="MyChoice" type="Selects" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
This validates the following:
<baseElement xsi:noNamespaceSchemaLocation="myTest.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<MyChoice>
<bbb></bbb>
</MyChoice>
<MyChoice>
<ccc></ccc>
</MyChoice>
</baseElement>
UPDATE
I think you are reaching the limit of what you can achieve with XSD. I can't see any way you can do this other than by defining a "version" of the MyChoice type for every single combination possible (which will then need different names MyChoice1, MyChoice2 etc)
You can also use xs:all
<xs:complexType name="Selects">
<xs:all minOccurs=2 maxOccurs=4>
<xs:element name="aaa" />
<xs:element name="bbb" />
<xs:element name="ccc" />
<xs:element name="ddd" />
</xs:all>
</xs:complexType>
but this will not prevent you from having four <ddd/>'s
Given this XML Schema snippet:
<xs:element name="data">
<xs:complexType>
<xs:sequence>
<xs:element name="param" type="param" minOccurs="0" maxOccurs="unbounded" />
<xs:element name="format" type="format" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
<xs:attribute name="name" type="xs:string" />
</xs:complexType>
</xs:element>
The intended result is valid <data> elements may contain 0 or more <param> elements followed by 0 or more <format> elements. Have I added the minOccurs/maxOccurs atttributes correctly, or should they be applied to the containing <xs:sequence>?
Correct or not, what would be the result of going one way or the other?
You have done it right and you can not add min/max occurs to sequence element. Using and XML editor that supports XML Schema might help you to validate your assumptions when you are in doubt. Here is a good free ware called XMLFox