When parsing your input, <hsc> performs a syntax check on it. It tests for things like missing end-tags, illegal tag nesting or missing required tags.It also tests attributes for tags, e.g. allowed values for the `ALIGN` option of <TG>IMG</TG>.

However, the syntax check of <hsc> is not very powerful compared to tools that only handle this task.

(<TechNote> Most errors <hsc> handles are of the kind <qq>Well, now a have to program this `if (..)` to avoid an enforcer hit/segmentation fault, why not display an error message now..</qq>.)

So if <hsc> does not report any syntax errors, it doesn't mean that your source is 100% correct. For a more complete and strict test, take a look at tools mentioned at .