Temporal JSON Schema Versioning in the JSchema Framework

JUpdate: A JSON Update Language

“…Whereas the statements dealing with (possibly complex) values are modeled on the SQL DML INSERT/DELETE/UPDATE statements (as shown in the five HLOs above), the JUpdate statements acting on JSON objects are modeled on the SQL ALTER DDL statement (as shown in the six HLOs below), where members of an object in a JSON document are assimilated to columns in a relational table. In fact, modifications that involve members deal with the structure of objects and, thus, can be considered for all intents (implicit) schema changes [26,27].…”

Versioning schemas of JSON-based conventional and temporal big data through high-level operations in the τJSchema framework

“…The proposed high-level operations are based on the primitives previously provided in (Brahmia et al, 2017(Brahmia et al, , 2018b(Brahmia et al, , 2019a. Since each primitive is consistency preserving (i.e., each primitive applied to a consistent τJSchema schema component generates a consistent τJSchema schema component) and high-level operation will be defined as a sequence of such primitives, our proposed high-level operations will also result consistency preserving.…”

“…Notice that, with respect to our previous works (Brahmia et al, 2017(Brahmia et al, , 2018b(Brahmia et al, , 2019a, the present paper deals with high-level operations that could be exploited by NSDBAs for creating and changing entire schemas in τJSchema-based NoSQL data stores.…”

“…In our previous work (Brahmia et al, 2017) and (Brahmia et al, 2018b(Brahmia et al, , 2019a, we have dealt with schema versioning in the τJSchema framework. In fact, in (Brahmia et al, 2017), we have shown how a conventional JSON schema could be versioned and have proposed two complete and sound sets of low-level operations: one for changing conventional JSON schemas and the other for updating temporal JSON schemas.…”

“…In our previous work (Brahmia et al, 2017) and (Brahmia et al, 2018b(Brahmia et al, , 2019a, we have dealt with schema versioning in the τJSchema framework. In fact, in (Brahmia et al, 2017), we have shown how a conventional JSON schema could be versioned and have proposed two complete and sound sets of low-level operations: one for changing conventional JSON schemas and the other for updating temporal JSON schemas. In (Brahmia et al, 2018b(Brahmia et al, , 2019a, we have enhanced the framework by incorporating the versioning of temporal logical and physical characteristics: we have shown how such characteristics can be versioned and proposed in this direction a complete and sound set of change primitives for their manipulation.…”