itemssuch

Itemssuch is a hypothetical term used in discussions of data querying and formal logic to denote an operator or predicate that selects items fulfilling a specified set of conditions. It is intended to formalize the idea of filtering a collection to those elements that meet all given criteria, without committing to a particular syntax or implementation.

The name derives from the phrase items such that, with itemssuch functioning as a compact shorthand. It is not part of any widely adopted standard, but it is used in theoretical examples to illustrate constraint-based selection across collections of objects. In practice, it serves as a teaching or design aid rather than a concrete language feature.

In a query-like notation, itemssuch would take a list of predicates and combine them with logical conjunction, for example: itemssuch(type = 'book' AND year >= 2000). Some descriptions show a broader form allowing nested subconditions and implicit composition rules, depending on the imagined language or framework.

Compared with explicit where clauses or filter operators in languages such as SQL, the internal concept of itemssuch is the same: it yields the subset of items that satisfy all given criteria. It is sometimes introduced with notes on negation (for example, itemssuch_not) to illustrate exclusion of certain subgroups.

Because itemssuch is not standardized, real-world implementations may use equivalent constructs under different names. It remains primarily of interest in academic writing, teaching, and as a mnemonic for designing declarative query interfaces.