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Glossary
========
.. glossary::
Abstract base class
A :term:`Base Class` that is not
directly usable by itself, but which defines the common properties
of several subclasses. Example: the class
:class:`MMTK.ChemicalObjects.ChemicalObject` is
an abstract base class which defines the common properties of its
subclasses :class:`MMTK.ChemicalObjects.Atom`,
:class:`MMTK.ChemicalObjects.Group`,
:class:`MMTK.ChemicalObjects.Molecule`,
:class:`MMTK.ChemicaObjects.Complex`, and
:class:`MMTK.ChemicalObjects.AtomCluster`. A :term:`Mix-in class`
is a special kind of abstract base class.
Base class
A class from which another class inherits. In most
cases, the inheriting class is a specialization of the base class.
For example, the class :class:`MMTK.ChemicalObjects.Molecule` is a
base class of :class:`MMTK.Proteins.PeptideChain`,
because peptide chains are special molecules. Another common
application is the :term:`Abstract base class`.
Mix-in class
A class that is used as a :term:`Base class`
in other classes with the sole intention of providing methods
that are common to these classes. Mix-in classes cannot be used
to create instances. They are a special kind of
:term:`Abstract base class`.
Example: class :class:`MMTK.Collections.GroupOfAtoms`.
Subclass
A class that has another class as its :term:`Base class`.
The subclass is usually a specialization of the base class, and can
use all of the methods defined in the base class.
Example: class :class:`MMTK.Proteins.Residue` is
a subclass of :class:`MMTK.ChemicalObjects.Group`.
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