All, We had a good focused call today to talk through the open patterning issues. Here is the consensus from that call. Issues that should be solved for 2.1 but need an owner (NewContext / MITRE / DHS / ?????) 51: STIX Patterning language needs a function to measure the length of a property 52: STIX Patterning language needs a null constant or is_null() function 59: STIX Patterning needs to support basic array operations 60: STIX Patterning needs to support basic dictionary operations 146: REPEATS is too exact Assigned to Jason 58: STIX Patterning needs to support basic mathematical operations 61: STIX Patterning needs to support basic string operations 62: STIX Patterning needs to support basic type operations 66: STIX Patterning language needs intra-list matching capability 85: Part 5 clarification on NOT operator Assigned to Allan 86: Handling Comparison Expressions that Cannot Be Evaluated Assigned to Drew 70: Restrict duplicate qualifiers per _expression_ Moved to STIX 2.2 53: STIX Patterning language needs to support specifying case-sensitivity for property matching 63: STIX Patterning needs to support basic statistical operations 73: STIX Patterning needs a capability for setting and manipulating variables 74: STIX Patterning needs a way of identifying context 75: STIX Patterning needs a way of describing actions Thanks Bret