[plt-scheme] Need help with struct:html

Brian Beckman writes:
 > Looking at the html library documentation in HelpDesk gives me the
 > following...
 > 
 > --- begin quote ---
 > 
 > Pcdata, Entity, and Attribute are defined in the XML documentation.
 >  
 > > Html-content = Html-element | Pcdata | Entity
 >  
 > > Html-element = any of the structures below which all inherit from
 >   (define-struct html-element (attributes)).  Any html tag that may
 >   include content also inherits from
 >   (define-struct (html-full struct:html-element) (content))
 >   without adding any additional fields.
 >  
 > A Html is
 > (make-html (listof Attribute) (listof Contents-of-html))
 >  
 > A Contents-of-html is either
 >   - Body
 >   - Head
 >  
 > ...
 > 
 > --- end quote ---
 > 
 > so, I try things like 
 > 
 > (html-Html-content s)
 > (html-content s)
 > (Html-content s)
 > (html-element s)
 > (Html-element s)
 > (html-Html-element s)
 > (html-Body s)
 > (html-Contents-of-html s)
 > (Contents-of-html s)
 > 
 > and so on ... getting nothing but errors of various kinds, mostly
 > "undefined identifier".

I think you want `html-full-content'; that's the accessor for the
`content' field of the `html-full' struct, which every tag that can
have content will inherit from.  I agree this documentation is rather
obfuscated.

--dougo at place.org