Complex sentence: Smart Pascal is a RAD (rapid application development) language with a substantial component library and class hierarchy, called VJL (Visual JavaScript Library) and supports large repertoar of open-source JavaScript frameworks.
Split into simpler sentences: Smart Pascal is a RAD (rapid application development) language which ships with a substantial component and class library, called VJL (Visual JavaScript Library). It also supports a large repertoar of open-source JavaScript frameworks.