selectordomain

Selectordomain is a conceptual term used in computer science and data processing to denote the input space from which a selector can choose elements. It refers to the set of candidates over which a selector’s rules are applied in order to produce a subset or a specific result. The selectordomain may be defined by data structures, types, query semantics, or the constraints of a particular system.

Formally, if a selector is a function F that maps elements from a domain D to outputs, then D is the selectordomain. The characteristics of the domain—such as cardinality, structure, and provenance—influence how the selector operates and what results are possible. In databases, for example, the selectordomain corresponds to the set of records or tuples that a query can consider before filtering or transformation. In programming languages and data frameworks, the domain may consist of nodes, objects, or values that meet certain criteria.

Applications of the concept appear across several areas. In user interfaces, selectors identify a subset of elements to be updated or interacted with. In CSS, selectors determine which DOM nodes are targeted by style rules, effectively defining the selectordomain for styling actions. In functional programming and query languages, selectors facilitate extraction, transformation, or aggregation by narrowing a larger input space to relevant outputs.

Examples illustrate the idea: a dataset of users defines a domain of user records, and a selector for active users narrows this to those with an active status. A DOM traversal uses a selector to pick paragraph elements, reducing the domain to only those nodes.