In particular, the language provides graphical Hardware, software, information, personnel, procedures, andįacilities. General-purpose graphical modeling language for specifying,Īnalyzing, designing, and verifying complex systems that may include * Bloctivity Anti-Pattern = Conflate Block and Activity syntax and semantics.The OMG Systems Modeling Language™ (OMG SysML®) is a * Allocate all Activities to Partitions that represent Conrol Object Blocsk. * SA/SD DFD Anti-Pattern (a.k.a., "Back to the Future circa 1980" Anti-Pattern) = Define Activity diagrams as Functional Flow diagrams without Parttions that represent Control Objects. * Recursively decompose ("nest") Block hierarchies by alternating between BDD definitions and IBD usages. * Conflate Control Object, Interface Object, and Data Object Blocks. * Aggressively apply Object Triad Pattern triage techniques to Blocks in order to separate Control Objects, Interface Objects, and Data Objects. Compare and contrast UML Specification-Realization and Type-Instance dichotomies.Stated otherwise, Part Properties and Reference Properties in an IBD can have a different usages or roles depending upon how they are realized ("wired") in the IBD. IBD specifies Part Properties and Reference Properties usages or roles in the structural context of the Block that encapsulates them.A BDD defines a Block’s Properties, including its Part Properties (strongly owned Parts) and Reference Properties (shared Parts).white-box) and support recursive structural decomposition techniques during System Analysis & Design. IBD Block Usage DichotomyīDDs and IBDs complement each other (cf. When properly applied (See Usage Notes below) Block diagrams are recursively scalable and mathematically (parametrically) simulatable (See Executable Semantics below.) The purpose of Block Definition Diagrams is to specify system static structures that be used for Control Objects, Data Objects, and Interface Objects. compare and contrast: UML 2 Class and Component diagrams SA/SD System Context & Structure Chart diagrams IDEF IDEF1X diagrams.Blocks can be mathematically constrained via Constraint Blocks to produce mathematically simulatable Parametric diagrams.Behaviors can either be encapsulated by Blocks (e.g., Operations, Signals, and State Machines) or Allocated (via «allocate» Dependency) to Blocks (e.g., Activities/Actions) directly or indirectly (via Interfaces).Blocks can be recursively decomposed ("nested") into Parts by alternating between Block Definition Diagram (BDD) definitions and Internal Block Diagram (IBD) usages (See Usage Notes below.).(See Usage Notes below.)īlock Definition Diagram (bdd): A Block Definition Diagram is a static structural diagram that shows system components, their contents (Properties, Behaviors, Constraints), Interfaces, and relationships.
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