Class-, method-, and function- documentation comments, usually found in languages which accept a literal string indicating what something is like SmalltalkLanguage or CommonLisp, in the form:

	I am a PHP lexical scanner.  Call GET-TOKEN on me to retrieve tokens until I return NIL.

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I like this better than traditional third-person "This class scans PHP code. ..."  I'm not sure why.  --JasonFelice