R3 - modelint/shlaer-mellor-metamodel GitHub Wiki
R3 / 1:M
Modeled Domain is numerically partitioned by one or many Domain Partition
Domain Partition numerically partitions exactly one Modeled Domain
A Domain is organized as one or more Subsystems. Each Subsystem requires a numeric range 1-100
, for example, to number its Subsystem Elements. To avoid overlapping ranges, we partition the domain numerically. Here, for example, is a domain partitioned into three numeric ranges:
1, 50, 100
This establishes the ranges [1-49], [50-99], and [100-max]. max
represents the highest value defined by the Element Number type. Each Subsystem in the Domain will be assigned one of these three ranges by selecting a Domain Partition as its lowest value with the assumption that it cannot assign any values equal to or above the next highest partition, if one exists.
A Domain consisting of a single Subsystem requires only one range like so:
1
This yields the range [1-max]