Function checkNote13

checkNote13(patterns: Pattern[]): void
NOTE 13 and https://www.w3.org/TR/sparql11-query/#variableScope

In BIND (expr AS v) requires that the variable v is not in-scope from the preceeding elements in the group graph pattern in which it is used.
Parameters
- patterns: Pattern[]
Returns void
- Defined in rules-sparql-1-1/lib/validation/validators.ts:208