Re: Action item on the virtues of error-handling

: It seems clear to me the intent.  Perhaps the spec could have been written
a
: bit better:
: "whose generic identifier is not declared is mapped" -> "whose generic
: identifier is not declared must be mapped".
:
: I believe that "is" statements are the equivalent of must.


The presence of the language: "the installed base of HTML user agents"
makes the "must" interpretation infeasible.  Would the spec be requiring
something of an "installed base"?

Walden