The MarkMinder engine's object-orientated SGML parser can be used to import SGML documents conforming to arbitrary DTDs. The engine's ISAM database supports object persistence. It has a modular object-orientated design. The MarkMinder engine is required for use with the HyMinder HyTime engine.
The HyMinder engine is a library of C++ objects offering an object-orientated interface to HyTime objects and the constructs they contain. It is implemented as an application of MarkMinder.