Conditions in XSD

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July 27th, 2006, 12:08 PM

superprogrammer

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Conditions in XSD

I have an XML with following tags

<root tag>
<A>xxx </A>
xxx 
<C>xxx </C>
<D>xxx </D>
<E>xxx </E>
</root tag>

I want to mention in my XSD, the following things:

1) If tag <A>is present, then is optional and the tags <C>, <D>, <E> should not be present.

2) If tag <C>is present, then <D> is optional and the tags <A>, should not be present.
How to do it?

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July 28th, 2006, 02:20 AM

sandeep.rohilla

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hi superprogrammer,

hope it helps.

Code:


<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <xs:element name="root">
        <xs:complexType>
            <xs:choice>                                
                    <xs:group ref="t1"/>
                <xs:group ref="t2"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <xs:group name="t1">
        <xs:sequence>
            <xs:element name="a"/>
            <xs:element name="b" minOccurs="0"/>
        </xs:sequence>
    </xs:group>
    
    <xs:group name="t2">
        <xs:sequence>
            <xs:element name="c"/>
            <xs:element name="d" minOccurs="0"/>
            <xs:element name="e" />
        </xs:sequence>
    </xs:group>    
    
</xs:schema>

cheers,

Sandeep

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July 28th, 2006, 02:39 PM

jkmyoung

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regular expressions
ab? | cd?e? | b?d?e?

are you allowed to have elements bde, or no elements at all, or b and e, but not d?

July 29th, 2006, 12:58 AM

sandeep.rohilla

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hi superprogrammer,

schema provided above would only allow

Code:

<root_tag>
<A>xxx </A>
<B>xxx </B> (optional)
</root_tag>

Code:

<root_tag>
<C>xxx </C>
<D>xxx </D> (optional)
<E>xxx </E>
</root_tag>

I hope this is what you wanted ?

cheers mate,

sandeep

January 29th, 2009, 04:52 AM

sikorka

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question about conditions

Hi

My question is a bit similar to superprg question.

My xml looks as follows:
<mySth>
<a></a>

<c_is_optional></c_is_optional>
</mySth>

<otherSth>
<a></a>

</otherSth>

How can I do make my xsd guarantee that <c_is_optional> can only occur in element with prefix 'my'? It cannot occur in element starting with 'other'.

Anna

February 17th, 2009, 06:47 PM

newtechie

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About Conditions

Hi,

I am new XSD's.
Could anyone guide how to draw an XSD with the following conditions.

My requirement i slike this.

<root>
<a/>

<c/>
<d/>
<e/>
</root>

Here If <c> is present then only <d> should be present otherwize <d> should not.

How to make this possible.

Help would be appreciated.

Thanks.

February 18th, 2009, 10:43 AM

jkmyoung

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-> sikorka.
Make multiple types. done.

->newtechie

Have a nested sequence. eg. something like: (pseudo)

Code:

<sequence>
  <a>
  <b>
  <sequence minoccurs=0>
    <c>
    <d>
  </sequence>
  <e>
</sequence>

add minoccurs=0 to the other elements (a b e) as necessary
Assuming you mean the "if and only if" case.

February 18th, 2009, 11:28 AM

newtechie

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Conditions in XSD

Yep, got it....
Thank you very much.

Quote:

Originally Posted by jkmyoung

-> sikorka.
Make multiple types. done.

->newtechie

Have a nested sequence. eg. something like: (pseudo)

Code:

<sequence>
  <a>
  <b>
  <sequence minoccurs=0>
    <c>
    <d>
  </sequence>
  <e>
</sequence>

add minoccurs=0 to the other elements (a b e) as necessary
Assuming you mean the "if and only if" case.

May 29th, 2009, 09:10 AM

arm4n

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Hi, I have a similiar but different problem. The condition doesn't refers to an element, but a value of an element, is it possible ?
If element 'A' has value other than '1', then element B has to appear:
<Data>
<A>2</A>
yes
</Data>

But if Element 'A' has the value '1', then Element 'B' must not appear:
<Data>
<A>1</A>
</Data>

Thank you in advanced !

#10

July 1st, 2009, 09:55 AM

play4fun

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hi all
I have two question:
1. For schema bellow :

Code:

<xsd:schema>
...
<xsd:element name="root" nillable="false">
<xsd:complexType>
    <xsd:all>

      <xsd:element maxOccurs="1" minOccurs="1" name="el1" type="xsd:int"/>
      <xsd:element maxOccurs="1" minOccurs="1" name="el2" type="xsd:int"/>
 
    </xsd:all>

    <xsd:attribute name="m" use="required">
        <xsd:simpleType>
            <xsd:restriction base="xsd:string">
                <xsd:enumeration value="r"/>
                <xsd:enumeration value="ra"/>
            </xsd:restriction>
        </xsd:simpleType>
    </xsd:attribute>
</xsd:complexType>
</xsd:element>
</xsd:schema>

How will have to be modified that :
- if mode ( attribute m ) value is r , element el2 to be mandatory( minOccurs to be 1 )
- if mode ( attribute m ) value is ra, element el2 to be optional ( minOccurs to be 0 )

2.Second question : I have this element

Code:

<xsd:element maxOccurs="unbounded" minOccurs="0" name="Description" nillable="true">
        <xsd:complexType>
          <xsd:simpleContent>
            <xsd:extension base="xsd:string">
              <xsd:attribute name="Sequence" type="types:ValidInt_1_4" use="required"/>
              <xsd:attribute name="Use" type="enum:ArticleDescriptionTypeEnumeration" use="required"/>
            </xsd:extension>
          </xsd:simpleContent>
        </xsd:complexType>
      </xsd:element>

where validInt1_4 is a integer from 1 to 4, and ArticleDescriptionTypeEnumeration is a enumeration with 2 values, TYPE1 and TYPE2
Until now all were fine; but now i have to put one condition more, i can have only maxim 2 descriptions of type TYPE1 and max 2 descriptions of type TYPE2.
How cand be done this ?

Thanks all and best regards,
Marian

#11

July 7th, 2009, 11:20 AM

jkmyoung

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arm4n, play4fun q1: no. Cooccurence constraint. You'd need another validation method besides xml schema.

q2, can you instead limit Description with maxoccurs = 4?

#12

July 28th, 2009, 08:05 PM

bharath1880

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XSD constraints / validations

Hi techies,

I hv one question to share.. on xsd's
here is the prob desc

I have a element "Name" which has enum values say "kumar" and "Miller"
and i had another element "Address" with enum values "Inida" and "US"

Now when I create xml file and pass Name = Kumar and Address= "US", when Validates it shld throw me err. and when I pass Name=Kumar and Address = India it shld validate the xml file. Now question is how can I achieve this..?

Please post ur suggestions.

Regards
Bharat

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