What is ref attribute in XSD?
The ref attribute can include a namespace prefix. This attribute cannot be used if the parent element is the schema element. type. Optional. Specifies either the name of a built-in data type, or the name of a simpleType or complexType element.
What is attributes in XML Schema?
Attributes. Attribute has a default value. If the attribute is not specified in an instance within an XML document, the attribute has the value given. If the attribute is not present in the instance document, then the attribute should appear in the post-schema-validation infoset.
Which attribute is used to reference an XML Schema in an XML?
Reference the XSD schema in the XML document using XML schema instance attributes such as either xsi:schemaLocation or xsi:noNamespaceSchemaLocation.
What is schema attribute?
An attribute schema allows users to create a series of attributes for a layer to make data collection more efficient. The schema defines the name, type, and associated properties such as an optional picklist.
What is XSD element?
Overview of XSD An XSD defines the structure of an XML document. It specifies the elements and attributes that can appear in an XML document and the type of data these elements and attributes can contain. This information is used to verify that each element or attribute in an XML document adheres to its description.
What does Nillable true mean?
The nillable attribute specifies whether or not an explicit NULL value can be assigned to the element. True enables an instance of the element to have the NULL attribute set to true. The NULL attribute is defined as part of the XML Schema namespace for instances. The default is false. This attribute is optional.
What is true about XML schema?
An XML Schema describes the structure of an XML document, just like a DTD. An XML document with correct syntax is called “Well Formed”. An XML document validated against an XML Schema is both “Well Formed” and “Valid”.
Which is an attribute of schema element?
The default value is the value of the attributeFormDefault attribute of the element containing the attribute. Can be set to one of the following: “qualified” – indicates that this attribute must be qualified with the namespace prefix and the no-colon-name (NCName) of the attribute.
What are the data types used in XML Schema?
Supported XML Schema data types
- boolean.
- integer.
- decimal.
- string.
- duration.
- dateTime.
- date.
- time.