#### Description:

This attribute is a string which is to be used as the namespace prefix for all XML elements created as a result of writing an AST Object out through an XmlChan. The URI associated with the namespace prefix is given by the symbolic constant AST__XMLNS defined in ast.h. A definition of the namespace prefix is included in each top-level element produced by the XmlChan.

The default value is a blank string which causes no prefix to be used. In this case each top-level element will set the default namespace to be the value of AST__XMLNS.

Type:

  String.

#### Applicability

##### Object

All Objects have this attribute.
Copyright (C) 2021 East Asian Observatory