What is complex type in XML?
The complexType element defines a complex type. A complex type element is an XML element that contains other elements and/or attributes.
What is qualified and unqualified in XML schema?
Unqualified: If you declare a namespace without using a prefix (unqualified), the default namespace is changed. Qualified: When using qualified namespace declaration, you define a namespace prefix (like a reference) and only those elements will be in that namespace, that have the specified prefix.
What is attributeFormDefault unqualified?
Another combination, elementFormDefault=”qualified” and attributeFormDefault=”unqualified” matches the common case in which a namespace is attached to the root element as the default namespace that will, by definition apply to the included elements but not to the attributes.
What does elementFormDefault qualified mean?
To save you having to put form=”qualified” on every element declaration, stating elementFormDefault=”qualified” means that the targetNamespace applies to each element unless overridden by putting form=”unqualified” on the element declaration.
What does complex type mean?
A complex type is a template for defining rich, structured properties on entity types or on other complex types. Each template contains the following: A unique name. ( Required) The name of a complex type cannot be the same as an entity type name within the same namespace.
What are XML naming rules?
XML Naming Rules
- Element names are case-sensitive.
- Element names must start with a letter or underscore.
- Element names cannot start with the letters xml (or XML, or Xml, etc)
- Element names can contain letters, digits, hyphens, underscores, and periods.
- Element names cannot contain spaces.
What is xmlns attribute in XML?
The xmlns attribute in the second
What is sequence in XML?
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.
What is complex type in database?
Any data that does not fall into the traditional field structure (alpha, numeric, dates) of a relational DBMS. In an object DBMS or an object-relational DBMS, complex data types are stored as objects that are integrated into and activated by the DBMS.
Is complex a data type in C?
20.9 Complex Numbers ISO C99 introduces support for complex numbers in C. This is done with a new type qualifier, complex . There are three complex types, corresponding to the three real types: float complex , double complex , and long double complex .
What is simple element and complex element in XML?
A simple element is an XML element that does not have any attributes or any sub (child) elements. A simple element can be declared with a simple datatype. What is a complex element? A complex element is an XML element that have at least one attribute, or at least one sub (child) element.
When to use ” qualified ” or ” unqualified ” in XML?
The value must be “qualified” or “unqualified”. Default is “unqualified”. “unqualified” indicates that elements from the target namespace are not required to be qualified with the namespace prefix. “qualified” indicates that elements from the target namespace must be qualified with the namespace prefix Optional.
Is the mixed attribute allowed in ComplexType element?
Specifies whether character data is allowed to appear between the child elements of this complexType element. Default is false. If a simpleContent element is a child element, the mixed attribute is not allowed! Optional. Prevents a complex type that has a specified type of derivation from being used in place of this complex type.
How to define a ComplexType element in XML?
A complex type element is an XML element that contains other elements and/or attributes. choice|sequence)?, ( (attribute|attributeGroup)*,anyAttribute?)))) (The? sign declares that the element can occur zero or one time, and the * sign declares that the element can occur zero or more times inside the complexType element)
Why are QNames not included in XML namespaces?
At the request of the XML Schema Working Group, the XML Core Working Group is producing an erratum to [XML Namespaces] to clarify the meaning of colons in other contexts. In particular, this erratum makes it clear that entity names, processing instruction targets, and notation names are not QNames and they may not include colons.