Description of Attribute Properties in DTDs

All attribute nodes have this type.

Identifier for the particular attribute.

The attribute is required and it must always have the value specified by the Default property. You must always explicitly specify this attribute.

 

The attribute is optional. There is no default value.

 

The attribute is optional. If you do not specify it, the XML parser uses the value of the Default property.

 

The element must always explicitly specify this attribute and assign a value to it.

The attribute value can contain any valid character data. It is a text string.

 

The attribute value is the name of an entity defined in the DTD.

 

The attribute value is a space-separated list of entities that are defined in the DTD.

 

The attribute value is one of a set of specified values. When the value of the Content Type property is Enumerated, the attribute has an additional property: Allowed Values. Specify the allowed values in a space-separated list.

 

The attribute value is a unique name within the DTD.

 

The attribute value is an ID that is defined in the DTD.

 

IDREFs

The attribute value is a space-separated list of IDs that are defined in the DTD.

 

The attribute value is a valid XML name that is composed of letters, numbers, hyphens, underscores, and colons.

 

The attribute value is a space-separated list of name tokens.

 

The name of a notation specified in the DTD. The notation describes a non-XML data format, such as those used for image files. When the value of the Content Type property is Notation, the attribute has an additional property: Allowed Values. Specify the allowed values in a space-separated list.