Object Services RFP 5. OMG TC Document 95-3-25, 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... CORBA Persistent Object Service (the Persistence Service for short; similarly, we will skip object in the names of other CORBA Object Services) Throughout the paper, we show that it is non trivial to fulfill one of the key design principals proposed by OMG in the Requests For Proposals (e.g. [OMG95b]) which has been referred to as the Bauhaus principle: Minimize duplication of functionality. Functionality shouM belong to the most appropriate service. Each service shouM build on previous services when appropriate. As the corresponding OMG document [OMG94b] leaves the design of the ....

....3. localize a Datastore object using the pair data store type, datastore type in stance id 4. determine the PDS given the pair Datastore, Protocol 2.3 Reusing other services One of the CORBA architectural strategies is to stimulate mutual reuse among Object Services. More specifically, [OMG95b] reads: Each service should buiM on previous services when appropriate with the key motivation stated as Functionality should belong to the most appropriate service. With respect to the Persistence Service, the corresponding OMG specification discusses the option of integrating the Persistence ....

Object Services RFP 5. OMG TC Document 95-3-25, 1995.

....changes, as neither of these access control schemes is stable yet. Furthermore, the number of security standards for access control is still increasing. Currently, the Object Management Group solicits proposals from vendors in response to the Object Services Task Force RFP 3 on security and time [OMG]. Our TAM models will serve as a basis to judge the interrelationships with the access control schemes presented in this paper. Eventually it should be possible to integrate the numerous concepts of access control information into a common concept that is suitable to provide a structure of ....

Object Management Group. Object Services RFP 3. TC Document 94-7-1, 1994.

....Object Models for Object Query Services Author: Frank Manola and Gail Mitchell, GTE Laboratories Status: Discussion paper 1. Introduction The Object Management Group (OMG) has solicited responses to a Request for Proposal (RFP) covering an Object Query Service (OQS) This OQS RFP forms part of [OMG94]. The OQS, together with others, forms part of the OMG Object Management Architecture [OMG92] for defining open, distributed object systems. This paper discusses three candidate object models that could form the basis of the OQS, namely: the object model of the CORBA Interface Definition ....

....both data definition language and query language facilities. In addition, new facilities in SQL3 are intended to support full programming capabilities. 3. 10.3 Specific Requirements of the OMG Object Query Service RFP 19 As noted in the introduction, the OMG Object Query Service RFP (part of [OMG94]) does not impose a great number of detailed requirements on responses. It does, however, describe certain general characteristics of the proposed Query Service. This section briefly reviews the candidate object models and languages with respect to those characteristics. 1. Object oriented OQL ....

Object Management Group, Object Services RFP4, OMG TC Document 94.3.8, March 28, 1994.

....Security, are currently being reviewed by the OSTF. The adopted specification for these services will become COSS 3 and COSS 4. RFP5 [25] covers the Object Change Management Service, Object Collection Service, Object Trader Service, and Object Startup Service, and was issued in June, 1995. RFP6 [26] is the latest RFP which covers the Object Change Management Service, and was issued October 1995. These services covered by RFP5 and RFP6 are expected to be adopted by OMG within 1996. 5.1 Adopted Object Services The first two volumes of Object Service Specifications (COSS 1 and COSS 2) are now ....

....of a client object. 3) Startup Service. This service is used to fire off requests when the ORB is started so that Object Services, Common Facilities and other ORB based applications can do initial housekeeping. The following Object Services are the subject of the OS RFP 6 issued in October, 1995 [26]. 1) Object Change Management Service. Object Change Management Service provide for object interface, implementation and instance versioning and configuration management. They are basic object services that can be used to support the evolution and composition of complex system. All Object ....

Object Management Group. Object Services RFP6. OMG TC Document 95-10-13, October 30 1995.

....Concurrency Control [20] Submissions to RFP3 [12] and RFP4 [17] which cover services for Object Licensing, Object Properties, Object Query, Object Time, and OMA Security, are currently being reviewed by the OSTF. The adopted specification for these services will become COSS 3 and COSS 4. RFP5 [25] covers the Object Change Management Service, Object Collection Service, Object Trader Service, and Object Startup Service, and was issued in June, 1995. RFP6 [26] is the latest RFP which covers the Object Change Management Service, and was issued October 1995. These services covered by RFP5 and ....

....of objects. It allows specification of queries in object derivatives of SQL, or in direct manipulation query languages. The Object Query Service stresses fine grained object access. This service is now adopted. The following Object Services are the subject of the OS RFP 5 issued in June, 1995 [25]. 1) Collection Object Service. This service provides a uniform way for creation and manipulation of groups of objects such as sets, queues, stacks, lists, etc. 2) Trading Service. This supports matching of offered services to the needs of a client object. 3) Startup Service. This service is ....

Object Management Group. Object Services RFP5. OMG TC Document 95-6-18, June 5 1995.

.... Specification, Volumes 1 and 2 (COSS 1 and COSS 2) COSS 1 and COSS 2 include services for Object Naming, Object Events, Object Lifecycle, Persistent Object, Object Relationships, Object Externalisation, Object Transactions and Object Concurrency Control [20] Submissions to RFP3 [12] and RFP4 [17] which cover services for Object Licensing, Object Properties, Object Query, Object Time, and OMA Security, are currently being reviewed by the OSTF. The adopted specification for these services will become COSS 3 and COSS 4. RFP5 [25] covers the Object Change Management Service, Object Collection ....

....with Coordinated Universal Time (UTC) Pi It must be a Trusted Time Service, that is, it supports the policies and operations of secure OMA compliant systems as described in the Object Security Services. The following Object Services are the subject of the OS RFP 4 issued on September 26, 1994 [17]. 1) Object Licensing Service. This service provides a framework for the specification and management of licensing policies and usage metering. It also provides support for usage charging. 2) Object Properties Service. Object properties are typed, named values. They are dynamically associated ....

Object Management Group. Object Services RFP4. OMG TC Document 94-4-18, May 11 1994.

.... Object Services Specification, Volumes 1 and 2 (COSS 1 and COSS 2) COSS 1 and COSS 2 include services for Object Naming, Object Events, Object Lifecycle, Persistent Object, Object Relationships, Object Externalisation, Object Transactions and Object Concurrency Control [20] Submissions to RFP3 [12] and RFP4 [17] which cover services for Object Licensing, Object Properties, Object Query, Object Time, and OMA Security, are currently being reviewed by the OSTF. The adopted specification for these services will become COSS 3 and COSS 4. RFP5 [25] covers the Object Change Management Service, ....

....for Proposal (RFP) have been issued, and in some cases submissions have been presented and mergers are in progress. The content of new object services yet to have RFPs issued is constantly being debated. The following Object Services are the subject of the OS RFP 3 issued on September 26, 1994 [12]. 1) Object Security Services. Security is concerned with: ffl Confidentiality: Information is disclosed only to users authorised to access it. ffl Integrity: Information is modified only by users who have the right to do so, and only in authorised ways. ffl Accountability: Users are ....

Object Management Group. Object Services RFP3. OMG TC Document 94-7-1, July 5 1993.

....Application Objects. ffl The OMG Object Services API is modular, and objects may use few or many Object Services. ffl The Operations provided by Object Services are specified in IDL. The OMG Object Services Task Force (OSTF) has so far issued five RFPs (Request For Proposal) RFP1 [10] and RFP2 [11] led to the adoption by the OMG of a set of specifications known as Common Object Services Specification, Volumes 1 and 2 (COSS 1 and COSS 2) COSS 1 and COSS 2 include services for Object Naming, Object Events, Object Lifecycle, Persistent Object, Object Relationships, Object Externalisation, ....

Object Management Group. Object Services RFP2. OMG TC Document 93-6-1, June 1 1993.

....Facilities or Application Objects. ffl The OMG Object Services API is modular, and objects may use few or many Object Services. ffl The Operations provided by Object Services are specified in IDL. The OMG Object Services Task Force (OSTF) has so far issued five RFPs (Request For Proposal) RFP1 [10] and RFP2 [11] led to the adoption by the OMG of a set of specifications known as Common Object Services Specification, Volumes 1 and 2 (COSS 1 and COSS 2) COSS 1 and COSS 2 include services for Object Naming, Object Events, Object Lifecycle, Persistent Object, Object Relationships, Object ....

Object Management Group. Object Services RFP1. OMG TC Document 92-8-6, August 28 1992.

....defines one simple Datastore type, called DBDatastoreMgr. Other Datastore types are defined by other standards, including Posix files, ODBC for SQL, etc. 181 The OMG has also solicited responses to a Request for Proposal (RFP) covering an Object Query Service (OQS) This OQS RFP forms part of [OMG94b]. The OQS RFP does not impose a great number of detailed requirements on responses. It does, however, describe certain general characteristics of the proposed Query Service. The RFP requires that object service interfaces be object oriented, and expressed in IDL. Proposed extensions to IDL, CORBA, ....

....provides both data definition language and query language facilities. In addition, new facilities in SQL3 are intended to support full programming capabilities. 5.4.1.9.3 Specific Requirements of the OMG Object Query Service RFP As noted in Section 5. 3, the OMG Object Query Service RFP (part of [OMG94b]) does not impose a great number of detailed requirements on responses. It does, however, describe certain general characteristics of the proposed Query Service. This section briefly reviews the candidate object models and languages with respect to those characteristics (since SQL3 is ....

Object Management Group, Object Services RFP4, OMG TC Document 94.3.8, March 28, 1994.

....by OMG in the manual entitled CORBAservices: Common Object Services Specification [OMG95f] This is perhaps the reason why in some publications Object Services are also called CORBA Object Services. 3. 1 Architecture and Design Principles The key design principle, introduced by the OSTF [OMG95b] and denoted as the Bauhaus principle, reads: Minimize duplication of functionality. Functionality should belong to the most appropriate service. Each service should build on previous services when appropriate. This principle somewhat contradicts with another design principle stated in the same ....

....Lifecycle, and Persistence Services. Other RFPs followed, each dealing with a different subset of services: RFP2 Concurrency, Externalization, Relationship, Transaction; RFP3 Time, Security; RFP4 Licensing, Properties, Query; RFP5 Change Management, Collections, Trader. The document [OMG95b] also identifies other candidates that may, in the future, enrich the collection of the original twenty five services, e.g. Narrowing, Index, or Recovery Fault Management. With respect to the limited size of this paper, we focus, in Sections 3.3 through 3.6, upon the Lifecycle, Events, ....

Object Services RFP 5. OMG TC Document 95-3-25, 1995.

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Object Services RFP 5. OMG TC Document 95-3-25, 1995.

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