Ontologic Inc., U.S.A. ONTOS SQL Guide, 1991. Home/Search Document Not in Database Summary Related Articles Check |
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A Processing Framework For Object Comprehensions - Chan, Trinder (1997) (Correct)
.... for object oriented databases [14] as opposed to just a vehicle for optimisation as in [30,19] or a notation for studying the theoretical foundation of query languages as in [7,17] The design criteria adopted are thoroughly discussed in [15] A comparison of object comprehensions with ONTOS SQL [29], OSQL [24] O 2 SQL [3] ORION [21] EXCESS [8] OQL[C ] 6] CQL [16] and XSQL [20] can be found in [12] 3.2 Object Comprehensions Q0. Return names of staff earning less than 20000. set[ s StaffMembers; s.salary 20000 s.name ] 5 An example of an object comprehension query is ....
....Explicit specification of the resultant collection kind significantly simplifies the provision of algebraic support. OQL also allows such specification but with full type information. 3. 3 Expressive Power Object comprehensions are powerful because queries that can be expressed in ONTOS SQL [29], OSQL [24] O 2 SQL [3] and ORION [21] over the reference data model can also be expressed in object comprehensions. Translation rules from these query languages to object comprehensions can be found in [10] and those for ONTOS SQL are presented in [11] 3.4 Transforming Object Comprehensions ....
Ontologic Inc., U.S.A. ONTOS SQL Guide, 1991.
Object-Oriented Query Language Design and Processing - Chan (1994) (Correct)
....Data Models. erational part of the reference data model. The next chapter identifies the requirements of such an object oriented query language. Chapter 3 Query Language Requirements Many object oriented query languages [Ser87, CDV88, Bee88, DLR88, CDLR89, BM89, BCD90, Kim90, BTA90, Ont91c, DGJ92, KKS92] have been implemented and proposed. Some of these query languages are designed particularly for object oriented databases, e.g. LIFOO [BM89] and ORION [Kim90] Many are, however, adapted from other areas: the relational data model and its extensions, e.g. ONTOS SQL [Ont91c] ....
....BTA90, Ont91c, DGJ92, KKS92] have been implemented and proposed. Some of these query languages are designed particularly for object oriented databases, e.g. LIFOO [BM89] and ORION [Kim90] Many are, however, adapted from other areas: the relational data model and its extensions, e.g. ONTOS SQL [Ont91c] semantic data models, e.g. OSQL [Bee88] and object oriented programming languages, e.g. OPAL [Ser87] All of them, however, could be improved in one way or another. This chapter establishes a set of functional requirements for object oriented query languages which can be used to evaluate, ....
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Ontologic Inc., U.S.A. ONTOS SQL Guide, 1991. Bibliography 161
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