Time Domain fuzzy terms

Starting Time fuzzy terms

znn represents the Starting Time Fuzzy term within the preceding sharp time (for any term equal or greater than the applicable reference time frame, if previously specified) and/or which serves as context for predefined sharp time (for any term smaller than the applicable reference time frame, if previously specified). When no previous time is specified, it means that any occurrence of the fuzzy term is valid.

Example: (z15) means the beginning of peak hours on any day in any month in any year.

Example: (M12z15) means the beginning of peak hours in December in any year.

Sharp terms like dnn, hnn, mnn, etc may evaluate relative to a fuzzy context, if their default reference time frame isn't present.

Example: (d3s5) means beginning of third day of winter (default context for dnn would be day of month)

Example: (-m30z15) means 30 minutes before beginning of peak hours (default context for mnn would be hour in a day).

znn term may be preceded by a minus sign (-znn); unlike for sharp time terms, the minus sign alters the term semantics from "starts (or ends) at beginning of" to "starts (or ends) at end of" (for example, (M12-z15) means the end of peak hour in December in any year, whereas (-m30-z15) means 30 minutes before end of peak hour).

Fuzzy terms numbered z0-z49 are valid Starting Time fuzzy terms.

Table of Starting Time fuzzy terms

Time Duration fuzzy terms

znnn represents the Time Duration Fuzzy term. Fuzzy terms numbered z50-z100 are valid Time Duration fuzzy terms.

znnn term may be preceded by a minus sign (-znnn); unlike for sharp time terms, the minus sign alters the term semantics to become the complementary (for example, {z55} means during winter, whereas {-z55} means during non-winter).

Table of Time Duration fuzzy terms