XML validation with XSD: how to avoid caring about the sequence of the elements?

Question

I have following XSD code:

<xsd:complexType name="questions">     <xsd:sequence>         <xsd:element name="location" type="location"/>         <xsd:element name="multipleChoiceInput" type="multipleChoiceInput" minOccurs="0" maxOccurs="unbounded"/>         <xsd:element name="textInput" type="textInput" minOccurs="0" maxOccurs="unbounded"/>         <xsd:element name="pictureInput" type="pictureInput" minOccurs="0"/>     </xsd:sequence> </xsd:complexType> 

The problem here is: the elements location, multipleChoiceInput, etc. must appear in the same order they are declared. I don't want this to happen, I want that, in the validation process the sequence should not be relevant. How can I achieve this?

Another possibility I've tried has been:

<xsd:complexType name="questions">          <xsd:choice maxOccurs="unbounded">                <xsd:element name="location" type="location"/>               <xsd:element name="multipleChoiceInput" type="multipleChoiceInput" minOccurs="0" maxOccurs="unbounded"/>             <xsd:element name="textInput" type="textInput" minOccurs="0" maxOccurs="unbounded"/>             <xsd:element name="pictureInput" type="pictureInput" minOccurs="0" maxOccurs="1"/>         </xsd:choice>              </xsd:complexType> 

In this example, the sequence really does not matter anymore, and I can have so much elements as I want (what "all" would not allow me to do). But I still have the Problem with the min- and maxOccurs. In this example, I could have so many "pictureInput"s as possible, what is againt the constraint that I would like to have either 0 or 1.

Thanks a lot for helping!

Answer 1

<xsd:complexType name="questions">     <xsd:all>         <xsd:element name="location" type="location"/>         <xsd:element name="multipleChoiceInput" type="multipleChoiceInput"/>         <xsd:element name="textInput" type="textInput"/>         <xsd:element name="pictureInput" type="pictureInput"/>     </xsd:all> </xsd:complexType> 

NOTE: I have changed "sequence" to "all"

Sequence forces order (as defined). if order doesn't matter then all is used.

If there are chances of element occurence more than once then xsd:any can be used.

<xsd:complexType name="questions">     <xsd:sequence>         <xsd:any minOccurs="0"/>     </xsd:sequence> </xsd:complexType> 

You can find details of xsd:any at following link:

https://www.w3schools.com/xml/schema_complex_any.asp