ThingWorx Model Definition and Composer > Things > Thing Services > Rhino JavaScript Engine
  
Rhino JavaScript Engine
ThingWorx uses custom-rhino-js-5.1.0.jar (version Rhino 1.7R4).
JavaScript 1.7 is the default version in the Rhino shell. The JavaScript language is controlled by the ECMA-262 ECMAScript standard, which is a general purpose, cross-platform programming language. Rhino 1.3 and greater conform to edition 3 of the standard. Rhino 1.6 and greater implement ECMA-357 ECMAScript for XML (E4X). For more information on the Rhino standard, release notes, and implementation, see the https://developer.mozilla.org site.