RPL is a Postscript-like language developed by Octree Corporation. It is used to customize its TrueSolid and PicTree products. RPL instructions define the functionality and user interface (including Windows and X window GUIs) of TrueSolid and PicView. RPL in ASCII files is loaded at initialization or while the program is running (to add features or to define or control new objects). In fact, new features are routinely added to products in the field via e-mail.
RPL files ('.rpl' or '.ptr') run without modification on all supported workstations and PCs.
The development of RPL programs is supported for OEMs and end users of TrueSolid and for developers of PicView-based applications. PicView is a low-cost end-user product; no RPL development support is provided for PicView users.