The Pipesworld Domain
=====================

The Pipesworld domain was introduced in the 2004 planning competition. It
models the transportation of batches of petroleum products in a network of
pipelines.

The propositional and metric-time versions of the domain are the same as
in IPC 2004.

New Domain Versions
===================

MetricTime with Constraints (MetricTimeConstraints): This is a temporal
version of the domain with hard deadlines. These are deadlines on the
goals (expressed as within constraints) and on intermediate conditions
(expressed by always-within constraints).

MetricTime with Goal Preferences (a particular case of the ComplexPreferences 
category): This version of the domain places soft deadlines on the
achievement of the goals. Note that there can be several deadlines (with
different penalties for missing them) for some goals.