.. Contains the formatted docstrings for the core modules located in 'mdanalysis/MDAnalysis/core' ************************** Core modules ************************** The :mod:`MDAnalysis.core` modules contain functionality essential for MDAnalysis, such as the central data structures in :mod:`MDAnalysis.core.universe` and :mod:`MDAnalysis.core.groups` or the selection definitions and parsing in :mod:`MDAnalysis.core.selection`. .. toctree:: :maxdepth: 1 core/init Important objects for users =========================== All users of MDAnalysis need to understand the two most important classes in this section, namely the :class:`~MDAnalysis.core.universe.Universe` and the :class:`~MDAnalysis.core.groups.AtomGroup`. .. toctree:: :maxdepth: 1 core/universe core/groups .. _topology-system-label: Topology system =============== The topology system is primarily of interest to developers. .. toctree:: :maxdepth: 1 core/topology core/topologyobjects core/topologyattrs .. SeeAlso:: :ref:`Developer notes for Topology Parsers ` Selection system ================ The selection system is primarily of interest to developers. .. toctree:: :maxdepth: 1 core/selection