2.3 Summary of LtC classes

For quick reference, Table 1 below lists all of the classes included in the current version of the standard, plus some additional classes proposed but not yet incorporated.

Class Name	Description	Issue #	In v.1
Activity	An activity is something that occurs over a period of time and acts upon or with entities; it may include consuming, processing, transforming, modifying, relocating, using, or generating entities.	https://github.com/tdwg/cd/issues/310	No
Address	A physical postal address for an organisational unit or person.	https://github.com/tdwg/cd/issues/208	Yes
ChronometricAge	The age of a specimen or related materials that is generated from a dating assay.	https://github.com/tdwg/cd/issues/268	Yes
CollectionDescriptionScheme	A grouping of multiple ObjectGroups for a particular use case, purpose or implementation.	https://github.com/tdwg/cd/issues/109	Yes
CollectionStatusHistory	A historical log of changes to and statuses of the described collection over time.	https://github.com/tdwg/cd/issues/120	Yes
ContactDetail	Details of a method by which an entity such as a Person or OrganisationalUnit may be contacted.	https://github.com/tdwg/cd/issues/329	Yes
Event	An action that occurs at some location during some time.	https://github.com/tdwg/cd/issues/362	Yes
GeographicOrigin	The geographic location from which objects associated with the CollectionDescription were collected.	https://github.com/tdwg/cd/issues/131	Yes
GeologicalContext	Geological information, such as stratigraphy, that qualifies a region or place.	https://github.com/tdwg/cd/issues/178	Yes
Identifier	A numeric or textual value, or reference such as an IRI, that can be used to uniquely identify the object to which it is attached.	https://github.com/tdwg/cd/issues/126	Yes
MeasurementOrFact	A measurement of or fact about the ObjectGroup representing the objects in the collection description, or the relationship between the ObjectGroup and an associated class.	https://github.com/tdwg/cd/issues/289	Yes
ObjectClassification	An informal classification of the type of objects within the ObjectGroup, using a hierarchical structure.	https://github.com/tdwg/cd/issues/214	Yes
ObjectGroup	An intentionally grouped set of objects with one or more common characteristics.	https://github.com/tdwg/cd/issues/55	Yes
OrganisationalUnit	A unit within an organisational hierarchy which may be at, above or below the institutional level.	https://github.com/tdwg/cd/issues/197	Yes
Person	A person (alive or dead).	https://github.com/tdwg/cd/issues/219	Yes
PersonActivity	A link between a Person and an Activity to enable the role that the Person played in the Activity to be specified.	https://github.com/tdwg/cd/issues/314	No
PersonRole	A qualified association between a Person or OrganisationalUnit and an entity such as an ObjectGroup or MeasurementOrFact that enables the relationship to be contextualised with a specific role and time period.	https://github.com/tdwg/cd/issues/316	Yes
RecordLevel	The machine-actionable information profile for the collection description digital object.	https://github.com/tdwg/cd/issues/43	Yes
Reference	A reference to external resources and information related to the collection description.	https://github.com/tdwg/cd/issues/231	Yes
ResourceRelationship	A relationship between an instance of a class in the collection description standard to another instance of the same class, or an instance of a different class in the standard.	https://github.com/tdwg/cd/issues/279	Yes
SchemeMeasurementOrFact	A type of measurement or fact used by the CollectionDescriptionScheme, and the rules relating to its application.	https://github.com/tdwg/cd/issues/117	Yes
SchemeTerm	A Latimer Core term used by the CollectionDescriptionScheme and the rules relating to its application.	https://github.com/tdwg/cd/issues/113	Yes
StorageLocation	A physical location (such as a building, room, cabinet or drawer) within the holding institution where objects associated with the collection description are stored or exhibited.	https://github.com/tdwg/cd/issues/164	Yes
Taxon	A group of organisms (sensu http://purl.obolibrary.org/obo/OBI_0100026) considered by taxonomists to form a homogeneous unit.	https://github.com/tdwg/cd/issues/269	Yes
TemporalCoverage	A record of a time range represented by the collection within a particular context.	https://github.com/tdwg/cd/issues/333	Yes

Table 1: A summary of the classes in the Latimer Core standard, with links to the normative definitions and Github issues used to build the definitions.