I have written form screen which has as one of it's elements a
<textarea> box in which a user can input some text --like a simple
bio-- which will appear on another screen.  I'd like to edit check
this text. It would be a good idea to make sure that it has, among other
things, no <form> elements, say, or to make sure that if a <font>
tag occurs, that a matching </font> tag is present.

Is anyone aware of a  class or a package which I can use to parse this
text and do this kind of validation?


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