# Package org.apache.tools.ant.attribute

- Interface Summary
  Interface | Description
  --- | ---
  EnableAttribute | This interface is used by Ant attributes.

- Class Summary
  Class | Description
  --- | ---
  AttributeNamespace | This class is used to indicate that the XML namespace (URI) can be used to look for namespace attributes.
  BaseIfAttribute | An abstract class for if/unless attributes.
  IfBlankAttribute | Check if an attribute is blank or not.
  IfBlankAttribute.Unless | The unless version
  IfSetAttribute | Check if an attribute value as a property is set or not
  IfSetAttribute.Unless | The unless version
  IfTrueAttribute | Check if an attribute value is true or not.
  IfTrueAttribute.Unless | The unless version