Comments

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DTDs in both SGML and XML contain the type of comments familiar to Web page authors:

  <!-- this is a comment -->  

Comments can also be embedded inside SGML declarations for explanatory purposes. Embedded comments are delimited by two dashes, and a single declaration may contain many embedded comments.

  <!ATTLIST PARAM   name       CDATA      #REQUIRED -- property name --   value      CDATA      #IMPLIED  -- property value --   valuetype (DATAREFOBJECT) DATA -- How to interpret value --   type       CDATA      #IMPLIED  -- Internet media type --   >  

However, XML does not use this comment style, so you will not see it in the XHTML specification.

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