Ozsu, T., Peters, J., Szafron, D., Irani, B., Lipka, A., Munoz, A.: TIGUKAT: A Uniform Behavioral Objectbase Management System, VLDB'95 Conference Proceedings, 1995.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....ensure consistency in pursuing the semantics of change problem. The first approach is based on the adoption of invariants and rules, and has been used, for instance, in the ORION [2] and O [1] systems. The second approach, which was proposed in [32] and developed in the context of the TIGUKAT [33], is based on the introduction of axioms. In the former approach, the invariants define the consistency of a schema, and definite rules must be followed to maintain the invariants satisfied after each schema change. In the latter approach, a sound and complete set of axioms (provided with an ....

M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, A. Munoz, TIGUKAT: A Uniform Behavioral Objectbase Management System, The VLDB Journal 4 (3) (1995) 445--492, special issue on persistent object systems.

....often than the specified granularity. Some interesting issues arise in extending a database model to store and query data with multiple granularities. The introduction of temporal granularities in both the relational and the object oriented database model, has been investigated in previous works [8, 9, 10, 11, 12]. TSQL 2 [11] a standard for the relational model, provides limited facilities for querying temporal data with varying granularities. To the best of our knowledge, no extensive work has been done to formally define how temporal data with different granularities can be queried in the ....

M. T. Ozsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. VLDB Journal, 4(3):445--492, 1995.

....[14] The intercession property of many reflective systems, defined in [2] as the ability for a program to modify its own execution state or alter its own interpretation or meaning, can be applied to a DBMS, allowing the user to modify or to extend the data model. Vodak [14] and Tigukat [23] are fully reflective object oriented DBMSs (OODBMS) So we believe that, in a near future, there will be growing needs of persistence management in reflective models with intercession properties. Two architectures may arise: the use of a reflective OODBMS, or the reuse of existing DBMSs as ....

R. Peters, Tigukat: a Uniform Behavioral Objectbase Management System, PhD thesis, University of Alberta, Canada, 1994.

....TIGUKAT (tee goo kat) is a term in the language of Canadian Inuit people meaning objects. The Canadian Inuits, commonly known as Eskimos, are native to Canada with an ancestry originating in the Arctic regions of the country. 27 5. 1 The TIGUKAT Object Model Overview The TIGUKAT object model [Pet94] is purely behavioral with a uniform object semantics. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every component of information, including its semantics, is modeled as a ....

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, University of Alberta, 1994.

....IXQFWLRQ#:RUNVBIRU##G## HSDUWPHQW## #I###W##WLPH## #H## (PSOR HH ## IXQFWLRQ#0DQDJHV##G## HSDUWPHQW## #I###W##WLPH## #H##(PSOR HH## IXQFWLRQ#1XP2I(PSOR HH###G## HSDUWPHQW##S##SHULRG### #Q##LQWHJHU# 4. 7 TIGUKAT TIGUKAT [GORALWALLA93, ZSU93, ZSU95] is identified as a uniform behavioural object model. The model is behavioural in the sense that all access and handling of objects is restricted to the application of behaviours (operations upon objects, and is uniform in that every entity within the model has the status of a first class ....

.... Yes TMQL No No [KAEFER92A] MITSCHANG88] OQL T OSAM T OQL T Yes No [ALASHQUR89] SU89] SU91] SU93] TOODM TOODM TOOSQL SQL Yes No [ROSE91] ROSE93A] ROSE93B] OODAPLEX OODaplex Yes Daplex QL Yes No [WUU93] DAYAL92A] DAYAL89] TIGUKAT TIGUKAT Yes Yes Yes [GORALWALLA93] ZSU93] ZSU95] T Chimera T Chimera No No No [BFG96] T(F) ORM ORM Yes SQL No Yes [EPOP94] EDELWEISS94C] EDELWEISS93B] Review of Temporal Object Oriented Approaches Page 40 5.2 Time Model SSURDFK 7LPH HQVLW 7LPH 5HIHUHQFH 7LPH 2UGHU UDQXODULWLHV 8VHU#GHILQHG WLPH 7UDQVDFWLRQ WLPH 9DOLG#WLPH ....

M.T.Özsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz, "TIGUKAT: A Uniform Behavioral Objectbase Management System", The VLDB Journal, vol. 4, August 1995, pp. 100-147.

....not violate the autonomy of participating systems because the information provided to the stub is nothing more than a view that must be provided to any other user of that system. The second type of system is represented by a fully functional objectbase management system (OBMS) such as Tigukat [7]. Although the system is sufficiently verbose to understand the canonical model and DSVM, it still must have accesses to the underlying data mitigated by the runtime facilities of the DSVM. Therefore, Tigukat can bypass the canonical model, but runtime functions must be managed to ensure that ....

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Mu noz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, 1995.

....recursion) as a proper generalization of the relational data model. Tractable type inference has been emphasized [15] R.J. Peters introduced an object model with meet, join and product operations for type signatures intended for query type signature inference in course of object database access [16]. R.Mili, A.Mili, R.Mittermeier considered structure of component repository as an information retrieval system. Component retrieval problem is considered for functions as components modeled with relations containing all admissible pairs for the function input output. Refinement ordering of ....

Peters R.J. TIGUKAT: a uniform behavioral objectbase management system. Technical report TR 94-06, April 1994, University of Alberta

.... database systems have been proposed [25] the attribute timestamping approach associates time to object attributes [10, 11, 24] whereas the object versioning approach associates time to the whole object [20, 27, 29] However, few of the proposed models have been actually implemented [20, 23, 27]. In this report we propose and compare two possible approaches to implement temporal objectoriented data models, based on the attribute timestamping approach, on top of existing objectoriented database systems. In particular, we consider the temporal object oriented data model T Chimera [4] Our ....

M. T. Ozsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz, TIGUKAT: A Uniform Behavioral Objectbase Management System. in VLDB Journal 4(3):445-492, 1995.

....diagram. 1.4.4 Comparison of TOOMM with Related Approaches TOOMM integrates and extends well known concepts from object oriented, temporal, and multimedia data models to provide better DBMS support for multimedia applications. Especially, TOOMM utilizes concepts from T Chimera [4] and TIGUKAT [16] temporal object models, and the News on Demand [15] multimedia object model. The T Chimera object model provides the temporal (T) construct, which extends the type T with temporal capabilities. In TOOMM, we use this construct to add temporal capabilities to MMDTs. It provides us with a concept to ....

#zsu M. T., Peters R. J., Szafron D., Irani B., Lipka A., Munoz A., TIGUKAT: A Uniform Behavioral Objectbase Management System, The VLDB Journal, Vol. 4, 1995, pp. 100-147

....object, we have to evaluate the distance of the vehicle over a period time and have this distance be greater than a predefined threshold value. 4.4 Query Examples In this subsection we present some examples to show the expressiveness of our model. Since we are using TIGUKAT object calculus [Pet94] a brief introduction to it is necessary. The alphabet of the calculus consists of object constants (a; b; c; d) object variables (o; p; q; u; v; x; y; z) monadic predicates (C; P; Q) dyadic predicates ( 2; 62) an n ary predicate (Eval) a function symbol (fi) called behavior ....

....where fi is a set of behaviors defined on the type variable o. The semantics of this construct is to project over the behaviors in fi for o, meaning that after the operation only the behaviors given in fi will be applicable to o. A detailed description of the TIGUKAT object calculus is found in [Pet94] We assume that all the queries are posted to a particular video instance myVideo and also salient objects and events are timestamped objects as discussed in Section 4. We also assume that all clips are timestamped clips and c 2 myVideo:B clips:B history where c is an arbitrary clip. myVideo:B ....

R. Peters. TIGUKAT: A uniform behavioral objectbase management system. PhD thesis, Department of Computing Science, University of Alberta. Available as Technical Report TR94 -06, 1994.

....functions, and the relationships among them. Section 3.2 describes the TIGUKAT query model which provides the declarative query facilities to the object model. Two formal languages are defined: an object calculus and an equivalent object algebra. 3. 1 Object Model The TIGUKAT object model [35, 39] is defined behaviorally with a uniform semantics. The model is behavioral in the sense that the access and manipulation of objects is restricted to the application of behaviors (operations) upon objects. The model is uniform in that every concept within the model has the status of a first class ....

R. J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, Department of Computing Science. University of Alberta, 1994. (forthcoming).

.... Underlying Data Model Algebra MATISSE [4] MATISSE SQL p OODAPLEX [228] OODAPLEX DAPLEX [50] OSQL [20] IRIS SQL p OQL [103] OVM SQL p OQL T [206] OSAM T OSAM OQL TA algebra Orion [111] Kim SQL p PICQUERY [31] TEDM PICQUERY p Postquel [205] Postgres Quel p TMQL [104] TMAD SQL TQL [156] TIGUKAT SQL p TOOSQL [165] TOODM SQL p [164] TOSQL [163] TOODM SQL [164] VISION [34] Caruso meta functions p [172] Sciore 1 annotations [173] Sciore 2 EXTRA EXCESS [32] Table 6: Temporal object oriented query languages based are identified in the third and fourth columns. The fourth ....

Ozsu, M.T., Peters, R., Szafron, D., Irani, B., Lipka, A., and Mu~noz, "TIGUKAT: A Uniform Behavioral Objectbase Management System," VLDB Journal, (1995) (to appear).

....for every object no longer exists, or by adopting a language independent object model where the OODBMS defines its own object model and appropriate mappings are provided from languages to this object model. Examples of the former include GemStone [6] whereas OODAPLEX [12] O2 [16] and TIGUKAT [42] follow the latter approach. Consequently these systems, like strongly typed OODBMSs extended with role facilities, support object migration as well as allow an object to be viewed from different perspectives. With respect to the three aspects of NGIS requirements described in section 1, ....

M.T. Ozsu, et. al "TIGUKAT: A uniform behavioral objectbase management system." VLDB Journal, 4(3), VLDB Endowment, July 1995.

....4 shows how our temporal model is uniformly incorporated into TIGUKAT. In Section 5 we justify the richness of our temporal model by comparing it with other temporal object models. Section 6 concludes the paper and outlines future research. 2 The TIGUKAT Object Model The TIGUKAT object model [Pet94] is purely behavioral with a uniform object semantics. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every component of information, including its semantics, is modeled as a ....

....also extending the model to incorporate both valid and transaction time histories [GL OS95] Additionally, we are looking at storing and operating on times that have not been bound to any concrete value, for example the time now. We are also working on temporal extensions to the TIGUKAT algebra [Pet94] which will form the basis of a temporal query language as an extension of the TIGUKAT query language TQL [PL OS93] This language will enable us to access and manipulate temporal objects, answer historical queries, prepare summaries of past performance, or make projections into the future. ....

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, University of Alberta, 1994.

....trial as described in Section 1.1. We describe the type system for the medical trial object database in Section 4. In Section 5 we compare our model with other temporal object models. Section 6 concludes the paper and outlines future research. 2 Object Model Overview The TIGUKAT object model [22, 21] is purely behavioral with a uniform object semantics. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every component of information, including its semantics, is modeled as a ....

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, University of Alberta, 1994.

....would expect an object model to support. Thereby, making the dioeerent models comparable. 2.2. 1 Temporal Extensible Object Models Wuu and Dayal s extensions to OODAPLEX [94, 95] Cheng and Gadia s OOTempDBM [15] also based on OODAPLEX) and Goralwalla and #zsu s extensions to TIGUKAT [40, 66] are representatives of this class. We presents only Wuu and Dayal s model and compare it with the other two at the end of this section. 2.2.1.1 T OODAPLEX 8 T OODAPLEX is based on the object oriented data model OODAPLEX [30] which is an extension of the DAPLEX functional data model [79] ....

M. T. Ozsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. Tigukat: A uniform behavioral objectbase management system. VLDB Journal, 4(3):445492, January 1995.

....of its two child leaf nodes C 1 and C 2 . The root always spans all of the time intervals in the whole clip set. C5 C1 C3 C4 C2 1 1 2 2 2 Root 2 N N1 N3 1 ball john, car john,ball,bat ken,ball,bat john,ball,bat ken,ball,bat ken,ball,bat [1, 12] 1, 2] 3, 3] 4, 6] [7, 11] [12,12] 1, 3] 4, 11] 1, 11] john,mary,ball,bat Figure 3: A Common Video Object Tree Built by GMCO Algorithm We have developed a greedy algorithm, called Greedy Maximum Common Objects (GMCO) to build the CVOT tree. 8 Given a set of clips C, the GMCO algorithm builds the CVOT in a ....

....nodes C 1 and C 2 . The root always spans all of the time intervals in the whole clip set. C5 C1 C3 C4 C2 1 1 2 2 2 Root 2 N N1 N3 1 ball john, car john,ball,bat ken,ball,bat john,ball,bat ken,ball,bat ken,ball,bat [1, 12] 1, 2] 3, 3] 4, 6] 7, 11] 12,12] 1, 3] [4, 11] [1, 11] john,mary,ball,bat Figure 3: A Common Video Object Tree Built by GMCO Algorithm We have developed a greedy algorithm, called Greedy Maximum Common Objects (GMCO) to build the CVOT tree. 8 Given a set of clips C, the GMCO algorithm builds the CVOT in a bottom up fashion. The idea is ....

[Article contains additional citation context not shown here]

R. Peters. TIGUKAT: A uniform behavioral objectbase management system. PhD thesis, Department of Computing Science, University of Alberta. Available as Technical Report TR-94-06, 1994.

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Ozsu, T., Peters, J., Szafron, D., Irani, B., Lipka, A., Munoz, A.: TIGUKAT: A Uniform Behavioral Objectbase Management System, VLDB'95 Conference Proceedings, 1995.

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M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, , and A. Munoz. Tigukat: A uniform behavioral objectbase management system. In The VLDB Journal, pages 100-147, 1995.

....of these formulae has to be done by a database administrator; their automatic derivation is a topic for future research. In [7, 8] we describe how the calendar model, and the anchored and unanchored temporal primitives introduced in this paper are incorporated into the TIGUKAT object model [12]. In conclusion, we emphasize that modeling of unanchored temporal data with different and mixed granularities is an essential ingredient of temporal granularity, and should therefore be considered in the design of temporal models and temporal query languages. It is our position that assuming a ....

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, August 1995.

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M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, August 1995.

....types to index into all dimensions. In single receiver languages, the tables being compressed have behaviors along one dimension, and types along the other. Sharing between two behavior rows would imply that both behaviors invoke the same methods for all types, and although languages like Tigukat [15] allow this to happen, such a situation would be highly unlikely to occur in practice. Sharing between two type columns is also unlikely since it occurs only when a type inherits methods from a parent and does not redefine or introduce any new methods. Such sharing of type columns is more feasible ....

Ozsu, T., Peters, J., Szafron, D., Irani, B., Lipka, A., Mu~noz, A.: TIGUKAT: A Uniform Behavioral Objectbase Management System, VLDB'95 Conference Proceedings, 1995.

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M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A uniform behavioral objectbase management system. The VLDB Journal, 4:100---147, 1995.

No context found.

M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A uniform behavioral objectbase management system. The VLDB Journal, 4:100---147, 1995.

....The old interface of the type is still accessible at a time before the change was made. This alleviates the need of creating new versions of a type each time any change is made to a type. 3 The TIGUKAT Temporal Object Model 3. 1 Fundamentals of TIGUKAT Object Model The TIGUKAT object model [Pet94, OPS 95] is purely behavioral with a uniform object semantics. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every component of information, Submitted to the Sixteenth ....

....that can be performed on schema objects: add, drop and modify . Table 1 shows the combinations between the various schema object categories and Submitted to the Sixteenth International Conference on Conceptual Modeling (ER 97) the different kinds of operations that can be performed in TIGUKAT [Pet94, P O97] The bold entries represent combinations that implicate schema changes while the emphasized entries denote non schema changes. Operation Objects Add (A) Drop (D) Modify (M) Type (T) subtyping type deletion add behavior(AB) drop behavior(DB) add supertype link(ASL) drop supertype ....

[Article contains additional citation context not shown here]

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, University of Alberta, 1994.

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M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, August 1995.

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M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Mu~noz, TIGUKAT: A uniform behavioral objectbase management system, The VLDB Journal 4 (1995), no. 3.

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M.T. Özsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. "TIGUKAT: A uniform behavioral objectbase management", VLDB Journal, in press (to appear January 1995). 48

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M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, , and A. Munoz. Tigukat: A uniform behavioral objectbase management system. In The VLDB Journal, pages 100--147, 1995.

....DEC Alphas. The primary goal in developing this system is to show that the DSVM approach can produce a practical distributed POS for systems of realistic size and complexity which will provide a suitable base for a wide range of POS application including ObjectBase Management Systems (e.g. Tigukat [37]) Thus, performance and reliability are two chief concerns. With performance in mind, implementation is directly on top of the Mach microkernel [1] The use of Mach avoids the unnecessary overhead of a monolithic, multi purpose operating system but still provide a stable design environment. The ....

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100 -- 147, October 1995.

....this respect in that it captures and formalizes the salient features of DSE in OBSs and can be adopted as a common underlying foundation of individual systems. In order to clarify and illustrate the expressiveness of the axiomatic model, the DSE policies of the Tigukat 1 OBS [ Ozsu et al. 1995; Peters 1994] are presented as an example. DSE in Tigukat is reduced to the axiomatic model and compared to the axiomatization of Orion. Tigukat is being developed at the Laboratory for Database Systems Research 1 Tigukat (tee goo kat) is a term in the language of the Canadian Inuit people meaning objects. ....

....model presented in Section 2.1. Since the focus of this paper is the effects of changes at the schema level, we limit our discussion to the definition of the semantics of schema changes and exclude change propagation because the latter deals with the effects at the object instance level. See [Peters 1994] for a discussion of change propagation in Tigukat that uses the temporality of the object model [Goralwalla et al. 1995] 4.1 Object Model Overview The Tigukat object model [ Ozsu et al. 1995; Peters 1994] is purely behavioral with a uniform object semantics. The model is behavioral in that ....

[Article contains additional citation context not shown here]

PETERS, R. 1994. TIGUKAT: A Uniform Behavioral Objectbase Management System. Ph. D. thesis, Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada. Available as University of Alberta Technical Report TR94-06.

....model is unique in this respect in that it captures and formalizes the salient features of DSE in OBSs and can be adopted as a common underlying foundation of individual systems. In order to clarify and illustrate the expressiveness of the axiomatic model, the DSE policies of the Tigukat 1 OBS [ Ozsu et al. 1995; Peters 1994] are presented as an example. DSE in Tigukat is reduced to the axiomatic model and compared to the axiomatization of Orion. Tigukat is being developed at the Laboratory for Database Systems Research 1 Tigukat (tee goo kat) is a term in the language of the Canadian Inuit people ....

....and exclude change propagation because the latter deals with the effects at the object instance level. See [Peters 1994] for a discussion of change propagation in Tigukat that uses the temporality of the object model [Goralwalla et al. 1995] 4. 1 Object Model Overview The Tigukat object model [ Ozsu et al. 1995; Peters 1994] is purely behavioral with a uniform object semantics. The model is behavioral in that all access and manipulation of objects is based on the application of behaviors. Behaviors in the Tigukat model correspond to the generic concept of properties discussed in Section 2.1. The model ....

OZSU, M., PETERS, R., SZAFRON, D., IRANI, B., LIPKA, A., AND MU NOZ, A. 1995. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal 4, 3 (July), 445--492. Special issue on persistent object systems.

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M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A uniform behavioral objectbase management system. The VLDB Journal, 4:100---147, 1995.

No context found.

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 1995. In press.

....conversion, and filtering are techniques for defining when and how coercion takes place. Due to space restrictions, change propagation is not addressed in this paper. In order to clarify the expressiveness of the axiomatization, the dynamic schema evolution policies of the TIGUKAT 1 OBMS [5, 7] are presented as an example and reduced to the axiomatic model. TIGUKAT is being developed at the University of Alberta and has a uniform, extensible object model capable of supporting database services within a single underlying framework. In keeping with its modeling capability, the schema ....

....TIGUKAT object model, define the dynamic schema evolution policies of TIGUKAT, and indicate how these policies can be described using the axiomatic model presented in Section 2. We focus on the definition of the semantics of schema changes and exclude change propagation from the discussion. See [7] for a discussion of change propagation in TIGUKAT that uses the temporality of the model [2] 3.1 Object Model Overview The TIGUKAT object model [5, 7] is purely behavioral with a uniform object semantics. The model is behavioral in that all access and manipulation of objects is based on the ....

[Article contains additional citation context not shown here]

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada, 1994. Available as University of Alberta Technical Report TR94-06.

....conversion, and filtering are techniques for defining when and how coercion takes place. Due to space restrictions, change propagation is not addressed in this paper. In order to clarify the expressiveness of the axiomatization, the dynamic schema evolution policies of the TIGUKAT 1 OBMS [5, 7] are presented as an example and reduced to the axiomatic model. TIGUKAT is being developed at the University of Alberta and has a uniform, extensible object model capable of supporting database services within a single underlying framework. In keeping with its modeling capability, the schema ....

....model presented in Section 2. We focus on the definition of the semantics of schema changes and exclude change propagation from the discussion. See [7] for a discussion of change propagation in TIGUKAT that uses the temporality of the model [2] 3. 1 Object Model Overview The TIGUKAT object model [5, 7] is purely behavioral with a uniform object semantics. The model is behavioral in that all access and manipulation of objects is based on the application of behaviors to objects. Behaviors in TIGUKAT correspond to the generic concept of properties discussed in Section 2. The model is uniform in ....

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Mu noz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal (Special Issue on Persistent Object Systems), January 1995. In press.

....in this paper on medical trials in the field of pharmacoeconomics, our work can be applied in general to any medical or clinical trial. Accepted by Computers in Biology and Medicine Gamma Special Issue on Time Oriented Systems in Medicine conducted within the context of the TIGUKAT 2 system [21], briefly described in Section 2. In the next sub section, we describe a pharmacoeconomics study which motivates the features that our temporal model provides. We show, in the rest of the paper, how the various features of the temporal model can be used to represent, store, analyze, and reason ....

....trial as described in Section 1.1. We describe the type system for the medical trial object database in Section 4. In Section 5 we compare our model with other temporal object models. Section 6 concludes the paper and outlines future research. 2 Object Model Overview The TIGUKAT object model [22, 21] is purely behavioral with a uniform object semantics. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every component of information, including its semantics, is modeled as a ....

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, August 1995.

....as well. We use the Common Video Object Tree model (CVOT) 10] to build an abstract model. This abstract CVOT model is integrated into a temporal object model to provide concrete object database management system (ODBMS) support for video data. The system that we use in this work is TIGUKAT 1 [15], which is an experimental system under development at the University of Alberta. The major contributions of this paper are: the introduction of a unified representation of spatial objects, comprehensive support for user spatial queries, and support for user spatio temporal queries. Our work is ....

....from Figure 3 4.2 The OBMS Support CVOT is an abstract model. To have proper database management support for continuous media, this model needs to be integrated into a data model. We work within the framework of a uniform, behavioral object model such as the one supported by the TIGUKAT system [15]. The important characteristics of the model, from the perspective of this paper, are its behaviorality and and its uniformity. The model is behavioral in the sense that all access and manipulation of objects is based on the application of behaviors to objects. The model is uniform in that every ....

[Article contains additional citation context not shown here]

M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A uniform behavioral objectbase management system. The VLDB J., 4:100---147, 1995.

....is modeled as a first class object with well defined behavior. Other typical features supported by the model include strong object identity, abstract types, strong typing, complex objects, full encapsulation, multiple inheritance, and parametric types. This is the model of the TIGUKAT ODBMS [Pet94, OPS 95] that is being implemented at the University of Alberta. The primitive objects of the model include: atomic entities (reals, integers, strings, etc. types for defining common features of objects; behaviors for specifying the semantics of operations that may be performed on objects; ....

....type, class, behavior, function, and collection. There are three kinds of operations that can be performed on schema objects: add, drop and modify. Table 1 shows the combinations between the various schema object categories and the different kinds of operations that can be performed in TIGUKAT [Pet94, P O97] The bold entries represent combinations that imply schema changes while the emphasized entries denote non schema changes. Operation Objects Add (A) Drop (D) Modify (M) Type (T) subtyping type deletion add behavior(AB) drop behavior(DB) add supertype link(ASL) drop supertype link(DSL) ....

[Article contains additional citation context not shown here]

R.J. Peters. TIGUKAT: A Uniform Behavioral Objectbase Management System. PhD thesis, University of Alberta, 1994.

No context found.

M.T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System. The VLDB Journal, 4:100--147, August 1995.

....of its two child leaf nodes C 1 and C 2 . The root always spans all of the time intervals in the whole clip set. C5 C1 C3 C4 C2 1 1 2 2 2 Root 2 N N1 N3 1 ball john, car john,ball,bat ken,ball,bat john,ball,bat ken,ball,bat ken,ball,bat [1, 12] 1, 2] 3, 3] 4, 6] [7, 11] [12,12] 1, 3] 4, 11] 1, 11] john,mary,ball,bat Figure 3: A Common Video Object Tree Built by GMCO Algorithm We have developed a greedy algorithm, called Greedy Maximum Common Objects (GMCO) to build the CVOT tree. 8 Given a set of clips C, the GMCO algorithm builds the CVOT in a ....

M. T. Ozsu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A uniform behavioral objectbase management system. The VLDB Journal, 4:100---147, 1995.

....design decisions and the approach we have taken. This is followed, in Section 4, with a description of the persistence model of TIGUKAT. Section 5 presents the query model with emphasis on the user level languages. A more detailed description of the object and query models are given in [PL OS93a, Pet94] In Section 6, we provide a brief overview of our approach to providing the common database management functions such as query optimization, version management and transaction management. Finally, in Section 7 we end with a discussion of our future research directions. 2 Object Model The ....

....not require an associated class if there are no instances of that type (e.g. abstract types) T type defines behavior B classof for accessing the unique class (if it exists) associated with a particular type. Primitive types such as T integer and T real also have associated classes. We refer to [Pet94] for a discussion of these classes are supported. 2.4 Classes and Collections A class ties together the notions of type and object instances. The entire group of objects of a particular type, including its subtypes, is known as the extent of the type and is managed by its class. We refer to this ....

[Article contains additional citation context not shown here]

R.J. Peters. TIGUKAT: A uniform behavioral objectbase management system. PhD thesis, University of Alberta, Edmonton, Alberta, Canada, 1994. Available as University of Alberta Technical Report TR94-06.

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M.T. Ozsu, R.G. Peters, B. Irani, A. Lipka, A. Munoz, and D. Szafron. TIGUKAT: A uniform behavioral objectbase management system. The VLDB Journal, 1995. In press.

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M. T. Ozsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. Tigukat: A uniform behavioral objectbase management system. VLDB Journal, page 37, jan 1995.

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M. T. Ozsu, R. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. "TIGUKAT: A uniform behavioral objectbase management," VLDB Journal , 1995 (To appear).

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M. T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. Tigukat: A uniform behavioral objectbase management system. The VLDB Journal, 4(3):445--492, 1995.

No context found.

M. T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. Tigukat: A uniform behavioral objectbase management system. The VLDB Journal, 4(3):445--492, 1995.

No context found.

M.T. Oszu, R. J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. TIGUKAT: A Uniform Behavioral Objectbase Management System, 1995.

No context found.

M. T. Ozsu, R.J. Peters, D. Szafron, B. Irani, A. Lipka, and A. Munoz. Tigukat: A uniform behavioral objectbase management system. The VLDB Journal, 4(3):445-- 492, 1995.

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