Provenance Querying Sample Clauses

Provenance Querying. Provenance querying is an important aspect of the querying service. CRISTAL already offers partial functionality to store and query provenance and we need to extend it so that the provenance repositories could be queried from the Querying Service. There are primarily two ways for querying the provenance information in CRISTAL that can be extended in the querying service. One method is by using the querying service to directly access the database where ClusterStorage stores all the data. The domain specific implementation can be integrated with the neuGRID PKI based security infrastructure. To map workflows and Items and the associated Events to a specific user credential, a property might be introduced which holds the users Distinguished Name (DN). The details can be read in the provenance service section. When a user with a certificate containing the concerned DN accesses the Item, the user should be able to query and retrieve the results. This mechanism can be further extended to incorporate access control lists and implement fine grained authorization policies in accessing the provenance data. This interaction is shown in the following sequence in figure 21. Figure 21: Query Processing through Provenance Service
Sample 1
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Related to Provenance Querying

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