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Object versioning in Ode

R. Agrawal, S. Buroff, N. Gehani, D. Shasha
[1991] Proceedings. Seventh International Conference on Data Engineering  
INTRODUCTION Ode [2-4] is a database system and environment based on the object paradigm.  ...  Object versioning in O++ is orthogonal to type, that is, versioning is an object property and not a type property.  ...  We are currently building an Ode prototype. We are also working on a transaction model that exploits the versioning features in a novel way. We hope to report on these experiences in near future.  ... 
doi:10.1109/icde.1991.131493 dblp:conf/icde/AgrawalBGS91 fatcat:7nfkljptovcrpkvkxz6zopdwbu

Design Issues in Transaction-Time Temporal Object Database Systems [chapter]

Kjetil Nørvåg
2000 Lecture Notes in Computer Science  
In this paper, we discuss some temporal ODB research issues and possible solutions related to object storage, object management, main memory buffering, and language bindings.  ...  Object database systems (ODBs) are an attractive alternative to relational database systems, especially in application areas where the modeling power or performance of relational database systems is insufficient  ...  The CVOIDX is an index for all ODs of the current versions of objects in one container, one OD for each object version. 3.  ... 
doi:10.1007/3-540-44472-6_32 fatcat:imhke7butvcj3brz7s5eiz4ysm

Issues in Transaction-Time Temporal Object Database Systems

Kjetil Norvag
2001 Journal of Database Management  
In this paper, we discuss some temporal ODB research issues and possible solutions related to object storage, object management, main memory buffering, and language bindings.  ...  Object database systems (ODBs) are an attractive alternative to relational database systems, especially in application areas where the modeling power or performance of relational database systems is insufficient  ...  The CVOIDX is an index for all ODs of the current versions of objects in one container, one OD for each object version. 3.  ... 
doi:10.4018/jdm.2001100104 fatcat:j55onmmyknge7espzrxapxoxxq

The vagabond approach to logging and recovery in transaction-time temporal object database systems

K. Norvag
2004 IEEE Transactions on Knowledge and Data Engineering  
When using the log-only approach keeping previous versions comes almost for free, and this approach is therefore particularly interesting for transaction-time object database systems.  ...  In this paper, we describe in detail algorithms and strategies for object and log management that make support for these features possible.  ...  When the OD is found, the object is read from the physical location found in the OD. • Historical versions.  ... 
doi:10.1109/tkde.2004.1269673 fatcat:sieuky6ovbgz7g3rqtbqmc5jim

Maintaining temporal consistency of discrete objects in soft real-time database systems

B. Kao, Kam-Yiu Lam, B. Adelberg, R. Cheng, T. Lee
2003 IEEE transactions on computers  
In this paper, we define the concept of absolute and relative temporal consistency from the perspective of transactions for discrete data objects.  ...  In a real-time database system, two timing constraints need to be enforced. We require that transactions meet their deadlines (transaction timeliness) and read fresh data (data timeliness).  ...  ACKNOWLEDGMENTS The work described in this paper was partially supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU 1061/98E).  ... 
doi:10.1109/tc.2003.1183951 fatcat:wthwrkdwfja7fp5r5lq7ip37gm

The Persistent Cache: Improving OID Indexing in Temporal Object-Oriented Database Systems

Kjetil Nørvåg
1999 Very Large Data Bases Conference  
In this case, the index entries, which we call object descriptors (OD), also include the commit timestamp of the transaction that created the object version.  ...  In a temporal OODB, an OID index (OIDX) is needed to map from OID to the physical location of the object. In a transaction time temporal OODB, the OIDX should also index the object versions.  ...  An object update creates a new object version, without deleting the previous version, hence, a new OD for the new version has to be inserted into the OIDX.  ... 
dblp:conf/vldb/Norvag99 fatcat:gjhntzcbave5tfg7gkubboae4e

Efficient Use of Signatures in Object-Oriented Database Systems [chapter]

Kjetil Nørväg
1999 Lecture Notes in Computer Science  
In this report we show how the signatures can be stored in the OIDX, and used to reduce the average object access cost in a system.  ...  In an object-oriented database system (OODB) using logical OIDs, an object identifier index (OIDX) is needed to map from logical OID to the physical location of the object.  ...  In this report, we assume one OD for each object version, stored in a BX -tree. We include the commit time TIME in the OD, and use the concatenation of OID and time, OID Y T IME, as the index key.  ... 
doi:10.1007/3-540-48252-0_27 fatcat:2zdwchjovvc23mgouelekov4q4

Clinical Features of Olfactory Dysfunction in COVID-19 Patients

Min Young Seo, Won Suk Choi, Seung Hoon Lee
2021 Journal of Korean medical science  
Although subjective olfactory function is significantly decreased in the OD group, the objective olfactory function was not significantly different.  ...  Moreover, olfactory training is effective in COVID-19 patients with OD.  ...  Moreover, we assessed the effect of olfactory training in patients with OD who were confirmed by CC-SIT objectively.  ... 
doi:10.3346/jkms.2021.36.e161 pmid:34100564 pmcid:PMC8185125 fatcat:5wj7a3dx4ze7jj3zozlt7z7nem

Device-independent on demand synchronization in the Unico file system

Jonatan Schroeder, Michael J. Feeley
2015 2015 International Conference and Workshop on Computing and Communication (IEMCON)  
take into consideration the resource limitations in each device.  ...  As people increasingly use a wide variety of devices throughout their day, it becomes important to give users consistent and efficient access to their data in all their devices, while at the same time  ...  The latest commit shown in Figure 4 .2 is based on a previous version represented by commit object 742179.  ... 
doi:10.1109/iemcon.2015.7344509 fatcat:kmlhzzvgjjdkrgl6kpwsfwrybm

On Spatial-Range Closest-Pair Query [chapter]

Jing Shan, Donghui Zhang, Betty Salzberg
2003 Lecture Notes in Computer Science  
An important query for spatial database research is to find the closest pair of objects in a given space.  ...  Existing work assumes two objects of the closest pair come from two different data sets indexed by R-trees. The closest pair in the whole space will be found via an optimzed R-tree join technique.  ...  In this case, we process every pair of child entries, one from N ode(e 1 ) and the other from N ode(e 2 ), in the same way as step 4(c)ii of the version-one query algorithm does.  ... 
doi:10.1007/978-3-540-45072-6_15 fatcat:qkgyndzfonhilleqo6cmpri654

Page 161 of The Journal of the Operational Research Society Vol. 49, Issue 2 [page]

1998 The Journal of the Operational Research Society  
Although there is no barrier to attempting to place the linearised versions of (7), (8), and (9) in the objective, the last one alone would add as many objective terms as there are arcs in the network.  ...  If (9) in its linear version is also used, there will be as many new terms in each objective, as arcs of interest. However, the general procedures used for solving the problem remain the same.  ... 

Page 380 of IEEE Transactions on Computers Vol. 52, Issue 3 [page]

2003 IEEE Transactions on Computers  
With batching, a triggered recomputation goes to sleep for a short while, during which other newly triggered instances of denote the jth version of object o In a weak ACS, the object versions read can  ...  In an RCS, the object versions available to T are (0),, 0 In an ACS, the set of objects read by T must be (0)2, 022) because , 0x9) ANd (0;0, 022) as they ), (011, O22), ANA (012, o% the same recomputation  ... 

Updates and view maintenance in soft real-time database systems

Ben Kao, K. Y. Lam, Brad Adelberg, Reynold Cheng, Tony Lee
1999 Proceedings of the eighth international conference on Information and knowledge management - CIKM '99  
OD Applying on-demand in an RCS requires both an OD Manager and a Version Manager.  ...  Since different versions of a data item can appear in the database as well as in the unapplied list, the Version Manager needs to communicate with the OD Manager to retrieve a right version either from  ... 
doi:10.1145/319950.320020 dblp:conf/cikm/KaoLACL99 fatcat:t7ebmeuqzfgapna7htcwlh5l6i

RDF data evolution: automatic detection and semantic representation of changes

Nathalie Pernelle, Fatiha Saïs, Daniel Mercier, Sujeeban Thuraisamy
2016 International Conference on Semantic Systems  
A first experiment was conducted on different versions of DBpedia.  ...  In this context, it is important to develop approaches to detect and represent these changes.  ...  p, object) or existA(object, ?p, ?  ... 
dblp:conf/i-semantics/PernelleSMT16 fatcat:ugnphto4pfcihiwjixgjf3a2mm

Discontinuity Revisited: An Improved Conversion to Context-Free Representations

Adriane Boyd
2007 Linguistic Annotation Workshop  
= N ode's parent for each Child in ChildSubset Child's parent := P N ode remove N ode from tree The splitting conversion of the sentence from Figure 1 can be seen in Figure 3.  ...  of N ode ContSets := divide Children into subsets with continuous terminal yields for each ChildSubset in ContSets P N ode := new node P N ode's label := N ode's label with mark (*) P N ode's parent :  ... 
dblp:conf/acllaw/Boyd07 fatcat:ihx7yxx7frbjhmhyxowb6lbgsa
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