Information content entities
All information items that are derived from material entities (i.e. statements that reference material qualities and are factual claims about an entity) fall under the domain of information content entity
(ICE), very generally defined as a type of entity which bears information about something1. Any ICE class may have is about
object relations that connect it to other material entities or ICEs which define its aboutness. Examples: an “age since planting measurement datum
is about
some Spermatophyta
” (among other things); a “minimal inhibitory concentration
is about
some dose response curve
”, another ICE. Aboutness axioms should reinforce the content of term definitions.
The information content entity
data item
class holds singular entities or collections of entities that specifically record inputs or outputs of processes / equipment / human interaction. OBI distinguishes the following singular types of data items, usually called “datums”, as follows:
- A
measurement datum
class names and models the datum outputs of an assay, and their contextual semantics. - A
settings datum
class which enables modeling an apparatus control input. - A
predicted data item
class that applies to output of aprediction
process.
All datums are allowed a small set of data properties
directly or a value specifications
, either approach allows pertinent string, categorical or numeric value about an entity to be expressed.
1The ability of an ICE to bear information depends on the coding scheme and copyable medium it inheres in, hence it is a generically dependent continuant.