ConceptDraw PRO v10 by CS Odessa features a New SDL Diagrams Solution Posted 10/21/2015 at 1:43 UTC in Mac by gnye@amdesign.net | Permalink | Tweet California based CS Odessa today announces the availability of a new Specification and Description Language (SDL) Solution in ConceptDraw Solution Park. SDL is a hierarchically diagramming language that defines a system using system, block, and process diagrams connected via channels. Based on ConceptDraw PRO's powerful vector drawing features, the SDL Solution allows you to build diagrams quickly and is available for free to current owners of ConceptDraw PRO v10.