Existing Wording
Example: There's no element on Procedure so it can be used to say "this procedure did not occur"; however, a source system does have this flag on it's procedure records.

Proposed Wording
Example: There's no element on Procedure that can be used to say "this procedure did not occur"; however, a source system does have this flag on its procedure records.

Comments
"so it" is misleading wording which makes it sound like the absence of an element CAN be used to say "this procedure did not occur." The revised wording makes it clear that there is no element to say "this procedure did not occur."
it's = typo

Grahame's Comments
k.