:::{glossary} EDM Event Data Model is a set of classes that can be used to describe the contents of an event.
Hole A hole is a state on a track where no measurement was found.
Outlier
A measurement associated with a track, where the measurement is considered
far away from the nominal parameter vector of the track on the associated
measurement surface. This is often defined as measurement with a
SoA
Struct of Arrays is a memory layout in which individual properties of an
object are stored as contiguous arrays in a structure, where the same index
is associated with logically connected entries. The opposite is {term}AoS.
AoS Array of Structs is a memory layout where a collection of objects are stored in a single array, where each object internally has a member for each property.
Seed
A starting point for the track finding stage. E.g. a triplet of {term}space points<Space point> that are loosely compatible with a track hypothesis.
Space point A three dimensional (possibly approximated) location through which a particle will have passed and created masurements. In some cases, like strip detectors, space points are formed from multiple measurements. :::