Chron By James Hogan <james@albanarts.com> Chron is a tool for resolving chronological constraints in genealogies and chronologies of historical documents such as the Bible. There are several components: - Chron Prolog rules in src/. These are written in Prolog and define the rules which datasets can use to describe relationships, chronological events and contraints between them. It provides a certain level of abstraction in order to generate inferred chronological constraints, and can resolve the constraints using clgfd. - Chron C++ wrapper library in include/chron/ and src/. This uses SWI-Prolog to provides a way to access the Chron data from C++. - Chron C++ test program. This imports a dataset and resolves the constraints, printing the resulting date ranges out. - An external Chron dataset. This is written in Prolog using the Chron Prolog rules, and describes the actual relationships, chronological events, and constraints between them. There are some basic tests which may be run on a dataset like this: swipl -p chron=src/ -q -s src/check.pl -- --file ../path/to/dataset.pl Some of these tests compare the output of various generators run on a given dataset against corresponding .ref files. This allows you to check for changes in output as a result of chron changes.