Types of Entities
Entities are classified as general or parameter:
- A general entity can only be referenced within the document content.
- A parameter entity can only be referenced within the DTD.
Entities are also further classified as parsed or unparsed:
- A parsed entity contains text, which will be incorporated into the document and parsed if the entity is referenced. A parameter entity can only be a parsed entity.
- An unparsed entity contains any kind of data, and a reference to it will result in the application's merely being notified of the entity's presence; the content of the entity will not be parsed, even if it is text. An unparsed entity can only be external.
Read more about this topic: SGML Entity
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