Danh mục: Unified Modeling Language

Visual Paradigm Online (VP Online) Express Edition a is free online graphing software developed for the community. Draw free diagrams with easy-to-use online drawing tools without watermarks and limitations such as number of diagrams, project file size, etc. You own the diagrams created for personal and non-commercial purposes.

A package is a grouping of model elements which means that a package can contain model elements of different kinds, including other packages to create hierarchies. A package defines a namespace for its contents using for various purposes.