Summary
Description of the profile
The ability to publish and discover information models will be supported by the semantic infrastructure, and the platform will leverage these capabilities.
Publish and Discover Information Models specializes capabilities architecturally implied by its associated concepts of Artifact , Awareness , Change , DataMediation , Discovery , GoalMediation , Information Model , Interoperability , Mediation , Metrics , Semantic Model . The implied architectural capabilities are described in the following paragraphs.
Artifact 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.
Awareness A service participant is aware of another participant if it has access to a description of that participant with sufficient completeness to establish the other requirements of visibility.
Awareness is inherently a function of a participant; awareness can be established without any action on the part of the target participant other than the target providing appropriate descriptions. Awareness is often discussed in terms of consumer awareness of providers but the concepts are equally valid for provider awareness of consumers.
Awareness can be decomposed into the creation of descriptions, making them available, and discovering the descriptions. Discovery can be initiated or it can be by notification. Initiated discovery for business may require formalization of the required capabilities and resources to achieve business goals.
Mechanisms providing support for awareness will likely have the following minimum capabilities:
- creation of Description, preferably conforming to a standard Description format and structure;
- publishing of Description directly to a consumer or through a third party mediator;
- discovery of Description, preferably conforming to a standard for Description discovery. This capability is a specialization of the inherited discovery capability of Artifact;
- notification of Description updates or notification of the addition of new and relevant Descriptions;
- classification of Description elements according to standardized classification schemes.
Change Artifact descriptions change over time and their contents will reflect changing needs and context.
Architectural implications of change on the Semantic Infrastructure are reflected in the following capabilities:
- mechanisms to support the storage, referencing, and access to normative definitions of one or more versioning schemes that may be applied to identify different aggregations of descriptive information, where the different schemes may be versions of a versioning scheme itself;
- configuration management mechanisms to capture the contents of the each aggregation and apply a unique identifier in a manner consistent with an identified versioning scheme;
- one or more mechanisms to support the storage, referencing, and access to conversion relationships between versioning schemes, and the mechanisms to carry out such conversions.
DataMediation The most common type of mismatch in the SemanticWeb occurs due to usage of different terminologies by entities that shall interchange information. Within ontology-based environments like the Semantic Web, this results from usage of heterogeneous ontologies as the terminological basis for resource or information descriptions. A main merit of ontologies is that such mismatches can be handled on a semantic level by so-called ontology integration technique. Regarding representation formats and transfer protocols, a suitable way of resolving such heterogeneities is to lift the data from the syntactic to a semantic level on basis of ontologies, and then resolve the mismatches on this level.
The Data Mediator is invoked in two situations: during the discovery phase and during the communication phase. The need for data mediation is necessary when the ontologies of the goal and of the candidate or selected web service are different - in both the discovery or the communication phase. For data level heterogeneity handling, it uses ontology mapping techniques to resolve the mismatches that can appear between two given ontologies. The mappings between ontologies are created in a semi-automatic manner during design time and stored in a persistent storage. That is, these mappings are retrieved during run-time and applied on the incoming data (i.e. ontology instances) to transform it from the terms of one ontology in the terms of another ontology (this process in known as instance transformation). The same mappings can also be used for determining which concepts from the mapped ontologies are semantically related (and how). The former functionality is required to enable the process level mediation (it solves the data heterogeneity for the communication stage), while the latter is required to enable the functional level mediation (solves the data heterogeneity that appears in the functional descriptions).
Discovery 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
GoalMediation Goal Mediators connect goals, i.e. both the source and target are goals. The mediation techniques used are (1) use of Data Mediators, and (2) functional level mediation on basis of logical relationship between source and target goals in order to increase the efficiency of functional discovery.
Information Model A well-defined service Information Model.
The capabilities of the Information Model include:
- describes the syntax and semantics of the messages used to denote actions and events;
- describes the syntax and semantics of the data payload(s) contained within messages;
- documents exception conditions in the event of faults due to network outages, improper message/data formats, etc.;
- is both human readable and machine processable
- is referenceable from the Service Description artifact.
Interoperability 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.
Mediation Strategies and methodologies for mediation.
Mediation includes the following capabilities:
- the creation of mappings,based on model artifacts.
- the creation of appropriate mapping rules, based on model artifacts in conjunction with references to instances. Since the execution environment includes the Semantic Infrastructure, all mediated models conform to the SI meta-meta-model.
- the execution of the mapping rules, which acts on the instance data taking as input source instances and having as output the target, mediated, instances
Metrics 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.
Semantic Model Artifact Descriptions make use of defined semantics, where the semantics may be used for categorization or providing other property and value information for description classes.
Architectural implications of semantics on the Semantic Infrastructure are reflected in the following capabilities:
- semantic models that provide normative descriptions of the utilized terms, where the models may range from a simple dictionary of terms to an ontology showing complex relationships and capable of supporting enhanced reasoning. This is a refinement of the Artifact metadata capability.
- mechanisms to support the storage, referencing, and access to these semantic models. This is a refinement of the Artifact store capability.
- configuration management mechanisms to capture the normative description of each semantic model and to apply a unique identifier in a manner consistent with an identified versioning scheme. This is a refinement of the Change configurationManagement capability.
- one or more mechanisms to support the storage, referencing, and access to conversion relationships between semantic models, and the mechanisms to carry out such conversions.
Capabilities
- batchLoadCurationArtifacts
- classification
- clinicalDataElements
- complianceDiscovery
- configurationManagement
- creation
- diagramModelBinding
- discovery
- exception
- identity
- interoperabilityDiscovery
- lineOfBusinessArtifacts
- localizeDataElements
- mappingDefinition
- mappingExecution
- mappingRules
- message
- metadata
- metrics
- metricsDiscovery
- monitor
- notification
- payload
- provenance
- publication
- semanticConversion
- serviceBinding
- serviceChangeNotification
- store
- transition
- versioning
Requirements traceability
Requirement |
Source |
Capability |
|---|---|---|
Allow model owners to create sandboxed data elements and concepts as necessary to use in their models |
Gap Analysis::Manage::006 - Sandboxed Data Elements and Concepts |
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Provide mechanism for users to load their model directly into the KR – instead of the curators and model owners doing the data load |
Gap Analysis::Import::040 - Load Models Directly to KR |
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Provide the capability to bulk/batch load new content from a variety of sources for later curation. |
Gap Analysis::Import::050 - Bulk,batch load |
|
Provide an easy way to create data elements from line of business artifacts such as a spreadsheet or database description |
Gap Analysis::Import::098.3 - Line of Business Artifacts |
|
Artifact lifecycle management and metadata requirements include the ability to: * Manage lifecycle, governance and versioning of the models, content and forms * Establish relationships and dependencies between models, content and forms * Determine provenance, jurisdiction, authority and intellectual property * Create represention and views of the information, realized through the appropriate transforms * Provide access control and other security constraints * Create annotations for better discovery and searching of artifacts * Develop usage scenarios and context for the information * Provide terminology and value set binding The artifacts are bound to the services via the service metadata. The service metadata combined with the artifacts and supporting metadata provide a comprehensive service specification. The artifact management requirements listed above are derived from the following use cases: * caEHR: The caEHR project has adopted ECCF for specifications and CDA documents for interoperability. The caEHR project requirements include the need for an infrastructure for managing all the artifacts generated during specification process, including HL7 models and documents. The caEHR project also intends to publish these artifacts for the community and vendors. The infrastructure needs to support better discovery, making all the relevant information available in the right context. * ONC and other external EHR adopters: ONC has adopted CCD and CCR for meaningful use. All national EHR implementations are expected to support forms and the semantics of these forms play a critical role in interoperability. The semantic infrastructure must provide a mechanism to create, store and manage these forms. * Clinical Trials: Clinical trials use forms to capture clinical information, and the semantics captured by these forms are critical for interoperability and reporting. The semantic infrastructure must provide a mechanism to manage the lifecycle of these forms. |
Semantic Infrastructure Requirements::Artifact Management::Artifact Lifecycle Management |
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CIC wants to be able to register and maintain the clinical data elements in a publicly available repository, |
Gap Analysis::HL7 CIC::CIC-1 - Store clinical data elements in a publicly available repository |
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This set of requirements includes providing an application developer with the ability to define application-specific attributes (for example, defined using ISO 21090 healthcare datatypes) and an information model that defines the relationships between these attributes and other attributes in the broader ecosystem. In particular, the last requirement suggests linked datasets, where application developers can connect data in disparate repositories as if the repositories are part of a larger federated data ecosystem. Additional requirements include the ability to publish and discover information models. Support is needed for forms data and common clinical document standards, such as HL7 CDA. To support the use of binary data throughout the system, the binary data must be typed and semantically annotated. All Information models, their representation and binding to data-types and terminologies will be managed by the semantic infrastructure. The ability to publish and discover information models will be supported by the semantic infrastructure, and the platform will leverage these capabilities. Link to use case satisfied from caGRID 2.0 Roadmap: The pathology, radiology and other data have various data formats which must be described, and the information model for the patient record must link between these various datatypes. The complete information model includes semantic links between datasets to build a comprehensive electronic medical record. Annotations on data are defined and included in the information model. |
Semantic Infrastructure Requirements::caGRID 2.0 Platform and Terminology Integration::Data Representation and Information Models |
batchLoadCurationArtifacts |
Service Oriented Architecture is an architectural paradigm for organizing and utilizing distributed capabilities that may be under the control of different ownership domains. Consequently, it is important that organizations that plan to engage in service interactions adopt governance policies and procedures sufficient to ensure that there is standardization across both internal and external organizational boundaries to promote the effective creation and use of SOA-based services. SOA governance requires numerous architectural capabilities on the Semantic Infrastructure: Governance is expressed through policies and assumes multiple use of focused policy modules that can be employed across many common circumstances This is elaborated in the inherited Policy profile. Governance requires that the participants understand the intent of governance, the structures created to define and implement governance, and the processes to be followed to make governance operational. This is provided by capabilities specialized from the inherited Management Profile. Governance policies are made operational through rules and regulations. This is provided by the following capabilities, most of which are specializations of the inherited Artifact Profile: * descriptions to enable the rules and regulations to be visible, where the description includes a unique identifier and a sufficient, and preferably a machine process-able, representation of the meaning of terms used to describe the rules and regulations; * one or more discovery mechanisms that enable searching for rules and regulations that may apply to situations corresponding to the search criteria specified by the service participant; where the discovery mechanism will have access to the individual descriptions of rules and regulations, possibly through some repository mechanism; * accessible storage of rules and regulations and their respective descriptions, so service participants can understand and prepare for compliance, as defined. * SOA services to access automated implementations of the Governance Processes. Governance implies management to define and enforce rules and regulations.. This is elaborated in the inherited Management profile. Governance relies on metrics to define and measure compliance. This is elaborated in the inherited Metric profile. |
Semantic Profile::OASIS SOA::Governance Model |
monitor from inherited abstract profile Metricsmetrics from inherited abstract profile Metricsdiscovery from inherited abstract profile Artifactidentity from inherited abstract profile Artifactmetadata from inherited abstract profile Artifactstore from inherited abstract profile Artifact |
Interaction is the activity involved in using a service to access capability in order to achieve a particular desired real world effect, where real world effect is the actual result of using a service. An interaction can be characterized by a sequence of actions. Consequently, interacting with a service, i.e. performing actions against the service--usually mediated by a series of message exchanges--involves actions performed by the service. Different modes of interaction are possible such as modifying the shared state of a resource. Note that a participant (or agent acting on behalf of the participant) can be the sender of a message, the receiver of a message, or both. Interacting with Services has the following architectural implications on mechanisms that facilitate service interaction: A well-defined service Information Model, as elaborated in the inherited Information Model profile. A well-defined service Behavior Model, as elaborated in the inherited Behavior Model profile. Service composition mechanisms to support orchestration of service-oriented business processes and choreography of service-oriented business collaborations, as elaborated in the inherited Service Composition profile. Infrastructure services that provides mechanisms to support service interaction, as elaborated in the inherited Interaction profile. A layered and tiered service component architecture that supports multiple message exchange patterns (MEPs)l, as elaborated in the inherited Message Exchange profile. |
Semantic Profile::OASIS SOA::Interacting with Services Model |
message from inherited abstract profile Information Modelpayload from inherited abstract profile Information Modelexception from inherited abstract profile Information ModelserviceBinding from inherited abstract profile Information ModeldiagramModelBinding from inherited abstract profile Information Model |
The Web Service Execution Environment (WSMX) is an environment that is designed to allow dynamic mediation, selection and invocation of web services. For the purposes of the Semantic Infrastructure roadmap, the WSMX specification has been abstracted to be applicable to any SOA environment, and to mediation of any artifact. A range of different models or ontologies describing the same or related problem domains could be created by different entities throughout the world. This implies that more and more systems and applications require mediation in order to be able to integrate and use heterogeneous data sources. Mapping between models is required in several classes of application, such as Information Integration and Semantic Web, Data Migration or Ontology Merging. Unfortunately, there is always a trade-off between how accurate these mappings are and the degree of automation that can be offered. There are approaches able to provide these kinds of mappings (also known as alignments) between different schemas or ontologies using machine learning techniques in an automatic manner but only with limited accuracy. In order to rule out the false results, the domain expert has to validate and check the mappings or the alignment at the end of the process. Another type of approach considers the human intervention from the beginning, proposing an interactive mapping process where the tool suggestions and the human user validations alternate in the process until the final result is achieved. The mediation solution presented in this roadmap follows the second approach described above: we propose well-defined strategies and methodologies for the mapping process in order to guarantee - the most correct and complete mappings possible, together with a set of algorithms and strategies meant to make the mapping task much easier (reducing it to simple validations and choices). We adopted this approach because we believe that in the context of SOA Services and business transactions the transformations on data must be 100% accurate. In addition, we consider that an interactive approach towards mapping creation is much more appropriate in the case of medium/large ontologies and also when the intention is to abstract the domain expert (using a graphical interface) from the underlying logical formalism used to represent the mappings. There are four types of heterogeneities that can occur within the SOA. Each heterogeneity type requires a specific technique for mismatch resolution, referred to as levels of mediation: * Terminology: Services or other resources use different terminologies; e.g. one entity understands name to be the full name of a person, and another one defines name to only denote the family name. This can hamper successful interoperation on the semantic level, i.e. concerning the meaning of information. * Representation Format and Transfer Protocol: resources that interact use different formats or languages for information representation (e.g. HTML, XML, RDF, OWL, etc.), or different protocols for information transfer (e.g. HTTP, RPC, etc.); incompatibilities on this level obviously can hamper prosperous information interchange. * Functionality: specific to services, this refers to functionalities of a provider and a requester that do not match exactly. This enforces complex and thus expensive reasoning procedures for detecting services usable for a given request; the need for such expensive operations can be reduced by gaining and utilizing knowledge on the functional heterogeneities * Business Process: also specific to services, this denotes mismatches in the supported interaction behavior of services and clients. This can hamper successful interaction on a behavioral level for consumption or interaction of services. The process of mediation generally consists of three main steps: * the creation of mappings,based on model artifacts. * the creation of appropriate mapping rules, based on model artifacts in conjunction with references to instances. Since the execution environment includes the Semantic Infrastructure, all mediated models conform to the SI meta-meta-model. * the execution of the mapping rules, which acts on the instance data taking as input source instances and having as output the target, mediated, instances Service message exchanges are represented in terms of the sender's models, and each of the business partners (e.g. enterprises) understands only messages expressed in terms of its own model. One of the roles of the execution environment (by mean of mediation), is to transform, if necessary, the received message from the terms of sender's model into the terms of the receiver's model, before sending it further. From the perspective of the models, each message contains instances of the source model that have to be transformed into instances of the target model. WSMX distinguishes four different types of mediators : * mediators that link two goals. This link represents the refinement of the source goal into the target goal * data mediators that import models and resolve possible representation mismatches between models. * mediators that link web service to goals, meaning that the web service (totally or partially) fulfils the goal to which it is linked. The mediators may explicitly state the difference between the two entities and map different vocabularies (through the use of data Mediators). * mediators linking two Web Services. |
Semantic Profile::OASIS Semantic SOA::Mediation |
mappingDefinition from inherited abstract profile MediationmappingRules from inherited abstract profile MediationmappingExecution from inherited abstract profile Mediation |
A service description is an artifact, usually document-based, that defines or references the information needed to use, deploy, manage and otherwise control a service. This includes not only the information and behavior models associated with a service to define the service interface but also includes information needed to decide whether the service is appropriate for the current needs of the service consumer. Thus, the service description will also include information such as service reachability, service functionality, and the policies and contracts associated with a service. A service description artifact may be a single document or it may be an interlinked set of documents. Architectural implications of service description on the Semantic Infrastructure are reflected in the following functional decomposition: * Description will change over time and its contents will reflect changing needs and context. This is elaborated in the inherited Change profile. * Description makes use of defined semantics, where the semantics may be used for categorization or providing other property and value information for description classes. This is elaborated in the inherited Semantic Model profile. * Descriptions include reference to policies defining conditions of use and optionally contracts representing agreement on policies and other conditions. This is elaborated in the inherited Policy profile. * Descriptions include references to metrics which describe the operational characteristics of the subjects being described. This is elaborated in the inherited Metrics profile. * Descriptions of the interactions are important for enabling auditability and repeatability, thereby establishing a context for results and support for understanding observed change in performance or results. This is elaborated in the inherited Interaction profile. * Descriptions may capture very focused information subsets or can be an aggregate of numerous component descriptions. Service description is an example of a likely aggregate for which manual maintenance of all aspects would not be feasible. This is elaborated in the inherited Composition 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. This is elaborated in the inherited Interoperability profile. Policy capabilities are specialization of Artifact capabilities. |
Semantic Profile::OASIS SOA::Service Description Model |
versioning from inherited abstract profile ChangeconfigurationManagement from inherited abstract profile Changetransition from inherited abstract profile Changediscovery from inherited abstract profile Artifactidentity from inherited abstract profile Artifactmetadata from inherited abstract profile Artifactstore from inherited abstract profile ArtifactsemanticConversion from inherited abstract profile Semantic Modelmonitor from inherited abstract profile Metricsmetrics from inherited abstract profile MetricsmetricsDiscovery from inherited abstract profile MetricscomplianceDiscovery from inherited abstract profile MetricsinteroperabilityDiscovery from inherited abstract profile InteroperabilityserviceChangeNotification from inherited abstract profile Interoperability |
One of the key requirements for participants interacting with each other in the context of a SOA is achieving visibility: before services can interoperate, the participants have to be visible to each other using whatever means are appropriate. The Reference Model analyzes visibility in terms of awareness, willingness, and reachability. Visibility in a SOA ecosystem has the following architectural implications on mechanisms providing support for awareness, willingness, and reachability: Mechanisms providing support for awareness will likely have the following minimum capabilities: * creation of Description, preferably conforming to a standard Description format and structure; * publishing of Description directly to a consumer or through a third party mediator; * discovery of Description, preferably conforming to a standard for Description discovery; * notification of Description updates or notification of the addition of new and relevant Descriptions; * classification of Description elements according to standardized classification schemes. In a SOA ecosystem with complex social structures, awareness may be provided for specific communities of interest. The architectural mechanisms for providing awareness to communities of interest will require support for: * policies that allow dynamic formation of communities of interest; * trust that awareness can be provided for and only for specific communities of interest, the bases of which is typically built on keying and encryption technology. The architectural mechanisms for determining willingness to interact will require support for: * verification of identity and credentials of the provider and/or consumer; * access to and understanding of description; * inspection of functionality and capabilities; * inspection of policies and/or contracts. The architectural mechanisms for establishing reachability will require support for: * the location or address of an endpoint; * verification and use of a service interface by means of a communication protocol; * determination of presence with an endpoint which may only be determined at the point interaction but may be further aided by the use of a presence protocol for which the endpoints actively participate. |
Semantic Profile::OASIS SOA::Service Visibility Model |
creation from inherited abstract profile Awarenesspublication from inherited abstract profile Awarenessnotification from inherited abstract profile Awarenessclassification from inherited abstract profile Awarenessdiscovery from inherited abstract profile Artifact |
batchLoadCurationArtifacts
Description
Provide the capability to bulk/batch load new content from a variety of sources for later curation.
Requirements addressed
Overview of possible operations
classification
Description
Classification of Description elements according to standardized classification schemes.
Requirements addressed
Overview of possible operations
clinicalDataElements
Description
Store clinical data elements in a publicly available repository.
Requirements addressed
Overview of possible operations
complianceDiscovery
Description
Mechanisms to catalog and enable discovery of compliance records associated with policies, contracts, and constraints that are based on these metrics.
Requirements addressed
Overview of possible operations
configurationManagement
Description
Mechanisms to support the storage, referencing, and access to normative definitions of one or more versioning schemes that may be applied to identify different aggregations of descriptive information, where the different schemes may be versions of a versioning scheme itself.
Requirements addressed
Overview of possible operations
creation
Description
Creation of Description, preferably conforming to a standard Description format and structure;
Requirements addressed
Overview of possible operations
diagramModelBinding
Description
Is both human readable and machine processable.
Requirements addressed
Overview of possible operations
discovery
Description
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.
Requirements addressed
Overview of possible operations
exception
Description
Documents exception conditions in the event of faults due to network outages, improper message/data formats, etc.
Requirements addressed
Overview of possible operations
identity
Description
Descriptions which include a unique identifier for the artifact.
Requirements addressed
Overview of possible operations
interoperabilityDiscovery
Description
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.
Requirements addressed
Overview of possible operations
lineOfBusinessArtifacts
Description
Provide an easy way to create data elements from line of business artifacts such as a spreadsheet or database description
Requirements addressed
Overview of possible operations
localizeDataElements
Description
Allow model owners to create sandboxed data elements and concepts as necessary to use in their models
Provide mechanism for users to load their model directly into the KR – instead of the curators and model owners doing the data load
Requirements addressed
- 040 - Load Models Directly to KR
- Data Representation and Information Models
- 006 - Sandboxed Data Elements and Concepts
- Artifact Lifecycle Management
Overview of possible operations
mappingDefinition
Description
The creation, destruction, editing, managing of mappings, based on model artifacts.
Requirements addressed
Overview of possible operations
mappingExecution
Description
The execution of the mapping rules, which acts on incoming source instances and provides mediated target instances.
Requirements addressed
Overview of possible operations
mappingRules
Description
The creation, destruction, editing, managing of appropriate mapping rules, based on model artifacts in conjunction with references to instances. Since the execution environment includes the Semantic Infrastructure, all mediated models conform to the SI meta-meta-model.
Requirements addressed
Overview of possible operations
message
Description
Describes the syntax and semantics of the messages used to denote actions and events
Requirements addressed
Overview of possible operations
metadata
Description
A representation of the meaning of terms used to describe the artifact, its functions, and its effects.
Requirements addressed
Overview of possible operations
metrics
Description
Access to metrics information generated or accessible by related services
Requirements addressed
Overview of possible operations
metricsDiscovery
Description
Mechanisms to catalog and enable discovery of which metrics are available for a described artifact and information on how these metrics can be accessed.
Requirements addressed
Overview of possible operations
monitor
Description
Access to platform infrastructure monitoring and reporting capabilities.
Requirements addressed
Overview of possible operations
notification
Description
Notification of Description updates or notification of the addition of new and relevant Descriptions;
Requirements addressed
Overview of possible operations
payload
Description
Describes the syntax and semantics of the data payload(s) contained within messages
Requirements addressed
Overview of possible operations
provenance
Description
While the Resource identity provides the means to know which subject and subject description are being considered, Provenance as related to the Description class provides information that reflects on the quality or usability of the subject. Provenance specifically identifies the entity (human, defined role, organization, ...) that assumes responsibility for the resource being described and tracks historic information that establishes a context for understanding what the resource provides and how it has changed over time. Responsibilities may be directly assumed by the Stakeholder who owns a Resource or the Owner may designate Responsible Parties for the various aspects of maintaining the resource and provisioning it for use by others. There may be more than one entity identified under Responsible Parties; for example, one entity may be responsible for code maintenance while another is responsible for provisioning of the executable code. The historical aspects may also have multiple entries, such as when and how data was collected and when and how it was subsequently processed, and as with other elements of description, may provide links to other assets maintained by the Resource owner.
Requirements addressed
Overview of possible operations
publication
Description
Publishing of Description directly to a consumer or through a third party mediator.
Requirements addressed
Overview of possible operations
semanticConversion
Description
One or more mechanisms to support the storage, referencing, and access to conversion relationships between semantic models, and the mechanisms to carry out such conversions.
Requirements addressed
Overview of possible operations
serviceBinding
Description
Is referenceable from the Service Description artifact.
Requirements addressed
Overview of possible operations
serviceChangeNotification
Description
Tools to appropriately track users of the descriptions and notify them when a new version of the description is available.
Requirements addressed
Overview of possible operations
store
Description
Accessible storage of artifacts and artifact descriptions, so service participants can access, examine, and use the artifacts as defined.
Requirements addressed
Overview of possible operations
transition
Description
One or more mechanisms to support the storage, referencing, and access to conversion relationships between versioning schemes, and the mechanisms to carry out such conversions.
Requirements addressed
Overview of possible operations
versioning
Description
Configuration management mechanisms to capture the contents of the each aggregation and apply a unique identifier in a manner consistent with an identified versioning scheme.
