Hi,
I've had a closer look at some of the examples, and I think I'm a bit
closer to the Real Thing now:
> a matches the word a
> a b matches the sequence 'ab' (b follows a)
> a,b matches the word a (X)OR the word b (OR or XOR?)
XOR, but this can probably be used with an arbitrary number of
comma-separated elements. In this case, it matches exactly one of the
elements.
> /a matches any sequence ending with the word a
a/b matches any sequence starting with a and ending with b.
> a> matches any sequence starting with the word a
see below.
> (x) matches the expression x
> [x] matches the expression x OR the empty string
> a<b matches a AND b, in any order
Actually, this one looks more like a 'reference' operator, in the
linguistic sense. 'a < b' would match an expression where b is used in
reference to b ("door < red" to match cases where the attribute 'red' is
used in reference to 'door', "go < to" where 'to' is used in reference to
'go', etc). "go [<to]" appears to be a common example for this.
I assume that '>' is a generic forward reference operator. IMHO, This can
be emulated sufficiently by matching a> to any sequence starting with 'a',
at least in english.
Again, these are my current assumptions, not canonical truths.
llap,
Christoph
