minor errors in WD-rdf-primer-20030905

Hi all.

Here are some small errors:

made affect ->
may affect

property interpret ->
properly interpret

may not used ->
may not be used

as normatively defined in ->
are normatively defined in

provides no additional meaning that such a program can directly use ->
? the object referred to by "such a program" is unclear and very remote

month, day, and year ->
(illogical order; I know: some don't like logic :-) )

later in this section). ->
later in this section.)

in explaining the example). ->
in explaining the example.)

Greetings
Sven