What does complexType mean in XSD?

Definition and Usage The complexType element defines a complex type. A complex type element is an XML element that contains other elements and/or attributes.

What is sequence in XSD?

The sequence element specifies that the child elements must appear in a sequence. Each child element can occur from 0 to any number of times.

How do you declare a repeated element in XSD?

1 Answer. Show activity on this post. If you want to only allow, say, 3 elements, use maxOccurs=”3″ instead, and so forth. If you instead want to specify that all the elements in the sequence can appear more than once, you can set the maxOccurs attribute on the tag instead.

What is complexType?

A complex type is essentially a type definition for elements that may contain attributes and elements. An element can be declared with a type attribute that refers to a complexType element that defines the structure, content, and attributes of that element.

What is simple type and complexType in XSD?

XSD Elements. XSD elements can be of type simpleType , complexType , or anyType . An element of type simpleType contains only text. It cannot have attributes and elements. An element of type complexType can contain text, elements, and attributes.

Does sequence matter in XML?

A sequence or choice may occur more than once. Choice is just one of a list of elements and sequence is a defined order of elements, ‘all’ is unordered. This is certainly useful in that it allows us to validate the syntax of an instance file but the order of the instance data is always deemed to be significant.

What is difference between XML and XSD?

XSD is based and written on XML. XSD defines elements and structures that can appear in the document, while XML does not. XSD ensures that the data is properly interpreted, while XML does not. An XSD document is validated as XML, but the opposite may not always be true.

What is the use of minOccurs and maxOccurs in XSD?

The minOccurs attribute specifies the minimum number of times that the element can occur. It can have a value of 0 or any positive integer. The maxOccurs attribute specifies the maximum number of times that the element can occur.

What is maxOccurs unbounded?

The maximum number of times an element may appear is determined by the value of a maxOccurs attribute in its declaration. This value may be a positive integer such as 41, or the term unbounded to indicate there is no maximum number of occurrences.

Do XML elements have to be in order?

In the most general sense, XML element order does not matter, unless otherwise specified by the appropriate schema.

What is elementFormDefault qualified in XSD?

elementFormDefault=”qualified” is used to control the usage of namespaces in XML instance documents (. xml file), rather than namespaces in the schema document itself (. xsd file). By specifying elementFormDefault=”qualified” we enforce namespace declaration to be used in documents validated with this schema.