I found some typos in the ‘RecordWildCards’ info box:

"Simply enabling this extension exten-
sion shouldn’t break any existing code, however be aware that in
some cases introducign record wildcards into an…

Should probably be:

Simply enabling this extension shouldn’t break any existing code, however be aware that in
some cases introducing record wildcards into an…

Also, on the next page it says:

“or prohibit it’s use”

I’m not a native English speaker, but I do believe that should be spelled as “or prohibit its use”