UML, BPMN, XML and JSON

UML and BPMN are modelling notations; XML and JSON are simple languages used for structuring information exchanged. They all work best with specialised tools. UML can be used for sketching, detailed design work or even to produce software code directly. UML diagram types include Class, Object, Use-case, Activity, Sequence and State diagrams. Each diagram is one view of a model. BPMN is used for describing workflow. XML is descriptive, extensible markup language for structuring information in documents. The structure of an XML document is specified in schema. JSON is simpler than XML and is widely used on the web.