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Federated Metadata Discovery and Analysis Functional Profile

There are numerous data repositories on the web today. These data repositories contain essential information that must be accessible to services in the ecosystem. As a result, caGrid 2.0 must provide capabilities to integrate these external repositories into the grid with the assumption that the remote service cannot be changed.

The semantic infrastructure will support integration with other metadata repositories, allowing the platform to leverage the semantic infrastructure for federated metadata discovery and analysis. The federated data query capabilities will be implemented by the platform.

From inherited abstract Artifact Functional Profile

An artifact is a managed resource within the Semantic Infrastructure.

An artifact is associated with the following capabilities:

• descriptions to enable the artifact to be visible, where the description includes a unique identifier for the artifact and a sufficient, and preferably a machine processible, representation of the meaning of terms used to describe the artifact, its functions, and its effects;
• one or more discovery mechanisms that enable searching for artifacts that best meet the search criteria specified by the service participant; where the discovery mechanism will have access to the individual artifact descriptions, possibly through some repository mechanism;
• accessible storage of artifacts and artifact descriptions, so service participants can access, examine, and use the artifacts as defined.

From inherited abstract Discovery Functional Profile

Discovery is the set of capabilities which enable searching for artifacts that best meet the search criteria specified by the service participant.

Aspects of discovery include:

• Search for services, policies, and other artifact descriptions accessible via some repository mechanism
• Search for operational characteristics of artifacts, which are metrics defined in artifact descriptions. The information is accessible via infrastructure monitoring capabilties or directly from services.
• Tracking and notification mechanisms related to artifact usage, service availability, operational conformance

Capabilities associated with discovery are delineated in the functional profiles inherited, and specialized, by the discovery profile, namely:

• Artifact
• Metrics
• Interoperability

From inherited abstract Interoperability Functional Profile

Descriptions provide up-to-date information on what a resource is, the conditions for interacting with the resource, and the results of such interactions. As such, the description is the source of vital information in establishing willingness to interact with a resource, reachability to make interaction possible, and compliance with relevant conditions of use.

Architectural implications of interoperability on the Semantic Infrastructure are reflected in the following capabilities:

• one or more discovery mechanisms that enable searching for described resources that best meet the criteria specified by a service participant, where the discovery mechanism will have access to individual descriptions, possibly through some repository mechanism;
• tools to appropriately track users of the descriptions and notify them when a new version of the description is available.

From inherited abstract Metrics Functional Profile

Artifact Descriptions include references to metrics which describe the operational characteristics of the subjects being described

Architectural implications of metrics on the Semantic Infrastructure are reflected in the following capabilities:

• access to platform infrastructure monitoring and reporting capabilities
• access to metrics information generated or accessible by related services
• mechanisms to catalog and enable discovery of which metrics are available for a described artifact and information on how these metrics can be accessed;
• mechanisms to catalog and enable discovery of compliance records associated with policies, contracts, and constraints that are based on these metrics.

Capability Elaborations

This Functional Profile includes, but is not limited to, the following capability elaborations:

• complianceDiscovery
• discovery
• externalMetadataRepositoryIntegration
• identity
• interoperabilityDiscovery
• localizeMetadataMaintenance
• metadata
• metrics
• metricsDiscovery
• monitor
• serviceChangeNotification
• store

Derived From Requirements

• Gap Analysis::Federation::084 - Localize Metadata Maintenance Federate the metadata infrastructure such that different organizations, departments, labs, software applications, etc. can maintain their own metadata while standards flow both top-down and bottom-up.  The current semantic infrastructure at NCI is not amenable to this type of federated model. 
• Semantic Infrastructure Requirements::caGRID 2.0 Platform and Terminology Integration::External Data Repositories There are numerous data repositories on the web today. These data repositories contain essential information that must be accessible to services in the ecosystem. As a result, caGrid 2.0 must provide capabilities to integrate these external repositories into the grid with the assumption that the remote service cannot be changed. The semantic infrastructure will support integration with other metadata repositories, allowing the platform to leverage the semantic infrastructure for federated metadata discovery and analysis. The federated data query capabilities will be implemented by the platform. Link to use case satisfied from caGRID 2.0 roadmap: The oncologist searches both TCGA glioblastoma data as well as de-identified data that has been added by care providers around the country. The additional data sets are external data repositories.

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complianceDiscovery capability elaboration

Mechanisms to catalog and enable discovery of compliance records associated with policies, contracts, and constraints that are based on these metrics.

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discovery capability elaboration

One or more discovery mechanisms that enable searching for artifacts that best meet the search criteria specified by the service participant; where the discovery mechanism will have access to the individual artifact descriptions, possibly through some repository mechanism.

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externalMetadataRepositoryIntegration capability elaboration

The semantic infrastructure will support integration with other metadata repositories, allowing the platform to leverage the semantic infrastructure for federated metadata discovery and analysis. The federated data query capabilities will be implemented by the platform.

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identity capability elaboration

Descriptions which include a unique identifier for the artifact.

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interoperabilityDiscovery capability elaboration

One or more discovery mechanisms that enable searching for described resources that best meet the criteria specified by a service participant, where the discovery mechanism will have access to individual descriptions, possibly through some repository mechanism.

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localizeMetadataMaintenance capability elaboration

Federate the metadata infrastructure such that different organizations, departments, labs, software applications, etc. can maintain their own metadata while standards flow both topdown and bottom-up. The current semantic infrastructure at NCI is not amenable to this type of federated model.

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metadata capability elaboration

A representation of the meaning of terms used to describe the artifact, its functions, and its effects.

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metrics capability elaboration

Access to metrics information generated or accessible by related services

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metricsDiscovery capability elaboration

Mechanisms to catalog and enable discovery of which metrics are available for a described artifact and information on how these metrics can be accessed.

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monitor capability elaboration

Access to platform infrastructure monitoring and reporting capabilities.

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serviceChangeNotification capability elaboration

Tools to appropriately track users of the descriptions and notify them when a new version of the description is available.

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store capability elaboration

Accessible storage of artifacts and artifact descriptions, so service participants can access, examine, and use the artifacts as defined.