What is XSI nil true in XML?

The xsi:nil=”true” attribute is defined in the XML instance document. The xsi:nil=”true” attribute indicates that, although the element exists, it has no content. An element with xsi:nil=”true” may still have other attributes, even if it does not have content.

What is Nillable true in XSD?

The nillable attribute can be defined on an xsd:element within an XML schema. It specifies that the xsi:nil attribute is valid for the element. If an XML schema has defined the nillable attribute as true, it is mapped as a required attribute and is included in the document, however, its values are nullified.

What is xmlns XSI?

xmlns:xsi declares a standard namespace prefix ( xsi ) for a core namespace used in XSD: http://www.w3.org/2001/XMLSchema-instance. XML Schema: Structures also defines several attributes for direct use in any XML documents.

How do you represent null in XML?

The most explicit way to represent a null value in XML is to include an empty tag set for the data item. Unsupported methods for passing Null or empty values: Another way to represent a null value would be to not iinclude the tags for that item.

What is XSI type?

The xsi:type attribute is used to indicate to the schema validator that the real type of a particular instance of an element is not the element’s declared type but rather a sub-type derived from the declared type.

What is Nillable true?

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.

What is complexType in XSD?

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

What is XSI schemaLocation?

The xsi:schemaLocation attribute locates schemas for elements and attributes that are in a specified namespace. Its value is a namespace URI followed by a relative or absolute URL where the schema for that namespace can be found. It is most commonly attached to the root element but can appear further down the tree.

What is a targetNamespace?

The targetNamespace is a convention of XML Schema that enables the WSDL document to refer to itself. In this example, we have specified a targetNamespace of http://www.examples.com/wsdl/HelloService.wsdl. specifies a default namespace: xmlns=http://schemas.xmlsoap.org/wsdl/.

Is null in XML?

There is no canonical answer, since XML fundamentally has no null concept.

What is null in XML?

If an element is declared with nullable=”true” then in the XML instance document if the element has xsi:null=”true” then this element has undefined content.

What does the nil attribute mean in XSI?

The xsi:nil attribute indicates that a certain element does not have a value or that the value is unknown. This is not the same as having a value that is zero or the empty string.

What does I : nil = ” true ” mean in XML?

Maybe i:nil actually means xsi:nil, this means that the FirstName element is empty, i.e. does not have any content — not even “”. It refers to the nillable property in XML Schema. nil is an attribute, defined in the i namespace. For this FirstName node, the attribute has the value true.

What does nil mean in the I namespace?

nil is an attribute, defined in the i namespace. For this FirstName node, the attribute has the value true.

What is the value of XSI nonamespace?

If your example did not use a namespace, you would use xsi:noNamespaceSchemaLocation, whose value is a single XSD-location-URI that hints to the location of the intended XSD and which should be retrievable.