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58
ULDBs: Databases with uncertainty and lineage
- IN VLDB
, 2006
"... This paper introduces ULDBs, an extension of relational databases with simple yet expressive constructs for representing and manipulating both lineage and uncertainty. Uncertain data and data lineage are two important areas of data management that have been considered extensively in isolation, howev ..."
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Cited by 310 (32 self)
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This paper introduces ULDBs, an extension of relational databases with simple yet expressive constructs for representing and manipulating both lineage and uncertainty. Uncertain data and data lineage are two important areas of data management that have been considered extensively in isolation, however many applications require the features in tandem. Fundamentally, lineage enables simple and consistent representation of uncertain data, it correlates uncertainty in query results with uncertainty in the input data, and query processing with lineage and uncertainty together presents computational benefits over treating them separately. We show that the ULDB representation is complete, and that it permits straightforward implementation of many relational operations. We define two notions of ULDB minimality—dataminimal and lineage-minimal—and study minimization of ULDB representations under both notions. With lineage, derived relations are no longer self-contained: their uncertainty depends on uncertainty in the base data. We provide an algorithm for the new operation of extracting a database subset in the presence of interconnected uncertainty. Finally, we show how ULDBs enable a new approach to query processing in probabilistic databases. ULDBs form the basis of the Trio system under development at Stanford.
Lineage retrieval for scientific data processing: a survey
- ACM Computing Surveys
, 2005
"... Scientific research relies as much on the dissemination and exchange of data sets as on the publication of conclusions. Accurately tracking the lineage (origin and subsequent processing history) of scientific data sets is thus imperative for the complete documentation of scientific work. Researchers ..."
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Cited by 172 (2 self)
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Scientific research relies as much on the dissemination and exchange of data sets as on the publication of conclusions. Accurately tracking the lineage (origin and subsequent processing history) of scientific data sets is thus imperative for the complete documentation of scientific work. Researchers are effectively prevented from
Provenance Information in the Web of Data
, 2009
"... The openness of the Web and the ease to combine linked data from different sources creates new challenges. Systems that consume linked data must evaluate quality and trustworthiness of the data. A common approach for data quality assessment is the analysis of provenance information. For this reason, ..."
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Cited by 57 (5 self)
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The openness of the Web and the ease to combine linked data from different sources creates new challenges. Systems that consume linked data must evaluate quality and trustworthiness of the data. A common approach for data quality assessment is the analysis of provenance information. For this reason, this paper discusses provenance of data on the Web and proposes a suitable provenance model. While traditional provenance research usually addresses the creation of data, our provenance model also represents data access, a dimension of provenance that is particularly relevant in the context of Web data. Based on our model we identify options to obtain provenance information and we raise open questions concerning the publication of provenance-related metadata for linked data on the Web.
A protocol for recording provenance in service-oriented grids
- In Proceedings of the 8th International Conference on Principles of Distributed Systems (OPODIS’04
, 2004
"... Abstract. Both the scientific and business communities, which are beginning to rely on Grids as problem-solving mechanisms, have requirements in terms of provenance. The provenance of some data is the documentation of process that led to the data; its necessity is apparent in fields ranging from med ..."
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Cited by 50 (15 self)
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Abstract. Both the scientific and business communities, which are beginning to rely on Grids as problem-solving mechanisms, have requirements in terms of provenance. The provenance of some data is the documentation of process that led to the data; its necessity is apparent in fields ranging from medicine to aerospace. To support provenance capture in Grids, we have developed an implementation-independent protocol for the recording of provenance. We describe the protocol in state machine or a three-dimensional state transition diagram. Using these techniques we sketch a liveness property for the system.
An Introduction to ULDBs and the Trio System
- IEEE Data Engineering Bulletin, Special Issue on Probabilistic Databases
, 2006
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Exploiting lineage for confidence computation in uncertain and probabilistic databases
, 2007
"... We study the problem of computing query results with confidence values in ULDBs: relational databases with uncertainty and lin-eage. ULDBs, which subsume probabilistic databases, offer an alternative decoupled method of computing confidence values: In-stead of computing confidences during query proc ..."
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Cited by 40 (10 self)
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We study the problem of computing query results with confidence values in ULDBs: relational databases with uncertainty and lin-eage. ULDBs, which subsume probabilistic databases, offer an alternative decoupled method of computing confidence values: In-stead of computing confidences during query processing, compute them afterwards based on lineage. This approach enables a wider space of query plans, and it permits selective computations when not all confidence values are needed. This paper develops a suite of algorithms and optimizations for a broad class of relational queries on ULDBs. We provide confidence computation algorithms for sin-gle data items, as well as efficient batch algorithms to compute con-fidences for an entire relation or database. All algorithms incorpo-rate memoization to avoid redundant computations, and they have been implemented in the Trio prototype ULDB database system. Performance characteristics and scalability of the algorithms are demonstrated through experimental results over a large synthetic dataset. 1.
The Case of the Fake Picasso: Preventing History Forgery with Secure Provenance
"... As increasing amounts of valuable information are produced and persist digitally, the ability to determine the origin of data becomes important. In science, medicine, commerce, and government, data provenance tracking is essential for rights protection, regulatory compliance, management of intellige ..."
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Cited by 40 (5 self)
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As increasing amounts of valuable information are produced and persist digitally, the ability to determine the origin of data becomes important. In science, medicine, commerce, and government, data provenance tracking is essential for rights protection, regulatory compliance, management of intelligence and medical data, and authentication of information as it flows through workplace tasks. In this paper, we show how to provide strong integrity and confidentiality assurances for data provenance information. We describe our provenance-aware system prototype that implements provenance tracking of data writes at the application layer, which makes it extremely easy to deploy. We present empirical results that show that, for typical real-life workloads, the runtime overhead of our approach to recording provenance with confidentiality and integrity guarantees ranges from 1 % – 13%. 1
A Survey of Data Provenance Techniques
, 2005
"... Data management is growing in complexity as large-scale applications take advantage of the loosely coupled resources brought together by grid middleware and by abundant storage capacity. Metadata describing the data products used in and generated by these applications is essential to disambiguate th ..."
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Cited by 29 (1 self)
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Data management is growing in complexity as large-scale applications take advantage of the loosely coupled resources brought together by grid middleware and by abundant storage capacity. Metadata describing the data products used in and generated by these applications is essential to disambiguate the data and enable reuse. Data provenance, one kind of metadata, pertains to the derivation history of a data product starting from its original sources. The provenance of data products generated by complex transformations such as workflows is of considerable value to scientists. From it, one can ascertain the quality of the data based on its ancestral data and derivations, track back sources of errors, allow automated re-enactment of derivations to update a data, and provide attribution of data sources. Provenance is also essential to the business domain where it can be used to drill down to the source of data in a data warehouse, track the creation of intellectual property, and provide an audit trail for regulatory purposes. In this paper we create a taxonomy of data provenance techniques, and apply the classification to current research efforts in the field. The main aspect of our taxonomy categorizes provenance systems based on why they record provenance, what they describe, how they represent and store provenance, and ways to disseminate it. Our synthesis can help those building scientific and business metadata-management systems to understand existing provenance system designs. The survey culminates with an identification of open research problems in the field. 1
Preventing History Forgery with Secure Provenance
"... As increasing amounts of valuable information are produced and persist digitally, the ability to determine the origin of data becomes important. In science, medicine, commerce, and government, data provenance tracking is essential for rights protection, regulatory compliance, management of intellige ..."
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Cited by 26 (2 self)
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As increasing amounts of valuable information are produced and persist digitally, the ability to determine the origin of data becomes important. In science, medicine, commerce, and government, data provenance tracking is essential for rights protection, regulatory compliance, management of intelligence and medical data, and authentication of information as it flows through workplace tasks. While significant research has been conducted in this area, the associated security and privacy issues have not been explored, leaving provenance information vulnerable to illicit alteration as it passes through untrusted environments. In this paper, we show how to provide strong integrity and confidentiality assurances for data provenance information at the kernel, file system, or application layer. We describe Sprov, our provenance-aware system prototype that implements provenance tracking of data writes at the application layer, which makes Sprov extremely easy to deploy. We present empirical results that show that, for real-life workloads, the runtime overhead of Sprov for recording provenance with confidentiality and integrity guarantees ranges from 1 % – 13%, when all file modifications are recorded, and from 12 % – 16%, when all file read and modifications are tracked.
Formalising a protocol for recording provenance in grids
- In Proceedings of the UK OST e-Science Third All Hands Meeting
, 2004
"... Both the scientific and business communities are beginning to rely on Grids as problemsolving mechanisms. These communities also have requirements in terms of provenance. Provenance is the documentation of process and the necessity for it is apparent in fields ranging from medicine to aerospace. To ..."
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Cited by 19 (6 self)
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Both the scientific and business communities are beginning to rely on Grids as problemsolving mechanisms. These communities also have requirements in terms of provenance. Provenance is the documentation of process and the necessity for it is apparent in fields ranging from medicine to aerospace. To support provenance capture in Grids, we have developed an implementation-independent protocol for the recording of provenance. We describe the protocol in the context of a service-oriented architecture and formalise the entities involved using an abstract state machine or a three-dimensional state transition diagram. Using these techniques we sketch a liveness property for the system. 1
