It is possible to define one's own general entities. The declaration occurs in the DTD subset, with a name and the associated replacement text.
It can then be used in the document using the entity reference syntax
&...;, either in text, or in attribute values.
<?xml version="1.0"?> <!DOCTYPE my-document [ <!ENTITY my-entity "This is my entity"> ]> <my-document> The entity was declared as follows: &my-entity; <element attribute="Entity: &my-entity;"/> </my-document>