QuoteRef: buxtJN_1962 ;;194 each object is a collection of attributes, states, and data

195 ;;Quote: control an operation by membership in a named set (its class)

QuoteRef: buxtJN_1962 ;;195 classes eg truck.1 truck.2 with class subscript and carries a subscript array eg truck.1(make)

QuoteRef: buxtJN_1962 ;;195 set is an ordered list (queue) of class subscripts i.e., within a class

195 ;;Quote: get a truck's location explicitly, via array of locations, via array of trucks at a particular location

QuoteRef: buxtJN_1962 ;;195 program divided into sectors-default fail branch is next sector, default succeed branch is next statement

QuoteRef: buxtJN_1962 ;;195 general statement: conditional-operation success-label failure-label

QuoteRef: buxtJN_1962 ;;195 operations head, tail (enque), from (deque), zero (empty queue), load (queue with set), in, notin (membership), e.g., entity.p head seta l&ll

QuoteRef: buxtJN_1962 ;;195 scope by indentation

QuoteRef: buxtJN_1962 ;;195 test chains: all at same indentation, implied and, explicitly or in margin. can have regular statements interspersed. arranged vertically.

QuoteRef: buxtJN_1962 ;;195 tests: all (all members satisfy test chain), exists (any members) unique (el) (el members satisfy test chain) default chain is true eg ALL i seta 11 &120< test chain

QuoteRef: buxtJN_1962 ;;195 searches using test chains: get max (exp) min (exp), first, last, any. e.g., FIND I seta MIN (exp) 11 & 12 .newLine. testchain-on-i