Package-level declarations

One x-wow-index entry of an aggregate's state schema, or the index of one of its access attributes (accessOf, BUILT_IN_ACCESS): its name and its keys, logical paths. Each query backend plans its own index from it, on its snapshots or, for the access attributes, its log.

The x-wow-index indexes of one aggregate's snapshot query model, planned against the schema its storage's facts compiled to: each declared Index with its keys resolved to where the storage keeps them. The core plans it once, refusing what no storage can index (a key the model does not know, or one the storage neither matches, ranges nor sorts); a backend applies its own rules on top, such as how many keys may hold many values (Key.cardinality), and creates or checks the indexes as its ddl says. logical is the model's logical definition, for a storage that maps the model's values rather than indexing keys.