gcube-model/docs/gcube-model-facet.rst

Facet

AccessPointFacet

AccessPointFacet captures information on an 'access point' of a resource, i.e., any web-based endpoint to programmatically interact with the resource via a known protocol. For example, it is used to define the network endpoint to contact the service. The endpoint can expose a well-known high-level protocol.

AccessPointFacet extends Facet

Properties
Name	Type	Attributes	Description
endpoint	String	Mandatory:true ReadOnly:true NotNull:true	The URI which characterises the specific endpoint instance.
description	String	Mandatory:false ReadOnly:false NotNull:false	A human-oriented text accompanying the access point.
entryName	String	Mandatory:false ReadOnly:false NotNull:false	A distinguishing string to be used by clients to identify the access point of interest.
authorization	Property <Property>	Mandatory:false ReadOnly:false NotNull:false	Contains authorisation information. e.g., a token, the couple username:password, etc.
protocol	String	Mandatory:false ReadOnly:false NotNull:false	The high-level protocol used by the access point. The String could contain the version if needed. e.g., Web Map Service (WMS) and not HyperText Transfer Protocol (HTTP) which is already contained in the URI.
Known Usage
Source	Relation	Multiplicity	Target	Description
ConcreteDataset <ConcreteDataset>	ConsistsOf <ConsistsOf>	1..n	AccessPointFacet <AccessPointFacet>	The access point to use for having access to the concrete dataset. The embargoState can be modeled through the access policy defined in the consistsOf relation.
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	AccessPointFacet <AccessPointFacet>	The access point to use for having access to the dataset. The embargoState can be modeled through the access policy defined in the consistsOf relation.
EService <EService>	ConsistsOf <ConsistsOf>	1..n	AccessPointFacet <AccessPointFacet>	Identify the endpoints of the EService.

The AccessPointFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

ActionFacet

This facet is expected to capture information on which action perform while a resource is added or removed from a context.

ActionFacet extends Facet

Properties
Name	Type	Attributes	Description
options	String	Mandatory:true ReadOnly:false NotNull:true	The options/params to use when executing the action.
type	EnumStringProperty <EnumStringProperty>	Mandatory:true ReadOnly:false NotNull:true	Type of action
source	String	Mandatory:false ReadOnly:false NotNull:true	From where to download the action.
command	String	Mandatory:false ReadOnly:false NotNull:false	The command to execute.
Known Usage
Source	Relation	Multiplicity	Target	Description
No specific known usage for this type.

The ActionFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

CPUFacet

CPUFacet captures information on the Central Processing Unit (CPU) of the resource it is associated with. A resource which needs to indicate a multi-processor/multi-core CPU will consist of more than one CPUFacet. Even if more than one CPUFacet is associated with a resource (i.e., an HostingNode <HostingNode>), we did not find any reason to differentiate the CPUs.

CPUFacet extends Facet

Properties
Name	Type	Attributes	Description
clockSpeed	String	Mandatory:true ReadOnly:false NotNull:true	Clock speed expressed with the unit, e.g., 1 GHz.
model	String	Mandatory:true ReadOnly:false NotNull:true	CPU Model
vendor	String	Mandatory:true ReadOnly:false NotNull:true	CPU Vendor
Known Usage
Source	Relation	Multiplicity	Target	Description
HostingNode <HostingNode>	ConsistsOf <ConsistsOf>	1..n	CPUFacet <CPUFacet>	The CPU equipping the Hosting Node.
VirtualMachine <VirtualMachine>	ConsistsOf <ConsistsOf>	1..n	CPUFacet <CPUFacet>	The CPU equipping the Virtual Machine.

The CPUFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

CapabilityFacet

CapabilityFacet captures a defined facility for performing a specified task supported by a given Resource. It is mainly used to provide a human-readable description of the capabilities of a resource (e.g., the support for transactions of an electronic device or some non-functional properties of a service like its replicability to support High-Availability (HA)).

CapabilityFacet extends Facet

Properties
Name	Type	Attributes	Description
name	String	Mandatory:true ReadOnly:false NotNull:true	The distinguishing name of the capability.
description	String	Mandatory:false ReadOnly:false NotNull:false	A human oriented description of the capability.
qualifier	String	Mandatory:false ReadOnly:false NotNull:false	A string used to specialise the capability.
Known Usage
Source	Relation	Multiplicity	Target	Description
Service <Service>	ConsistsOf <ConsistsOf>	0..n	CapabilityFacet <CapabilityFacet>	Any facility supported/offered by the Service.
Software <Software>	ConsistsOf <ConsistsOf>	0..n	CapabilityFacet <CapabilityFacet>

The CapabilityFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

ContactFacet

ContactFacet captures information on a point of contact for the resource, i.e., a person or a department serving as the coordinator or focal point of information concerning the resource.

ContactFacet extends Facet

Properties
Name	Type	Attributes	Description
eMail	String	Mandatory:true ReadOnly:false NotNull:true Regex:^[a-z0-9._%+-]{1,128}@[a-z0-9.-]{1,128}$	Email address
name	String	Mandatory:true ReadOnly:false NotNull:true	First Name
surname	String	Mandatory:true ReadOnly:false NotNull:true	Surname
middleName	String	Mandatory:false ReadOnly:false NotNull:false	Middle Name
title	String	Mandatory:false ReadOnly:false NotNull:false	A name describing the profession or marital status of the point of contact. e.g., Dr, Mrs, Mr.
Known Usage
Source	Relation	Multiplicity	Target	Description
Actor <Actor>	IsIdentifiedBy <IsIdentifiedBy>	1..1	ContactFacet <ContactFacet>	An Actor has at least a Contact Facet which permit to identify the Actor per se.
ConcreteDataset <ConcreteDataset>	HasMaintainer <HasMaintainer>	1..n	ContactFacet <ContactFacet>	The contact information of the entity responsible for the maintenance of the concrete dataset
Dataset <Dataset>	HasContact <HasContact>	1..n	ContactFacet <ContactFacet>	The contact information of the entity responsible for the dataset.
Dataset <Dataset>	HasContributor <HasContributor>	0..n	ContactFacet <ContactFacet>	The contact information on contributors supporting the creation and development of the Dataset.
Dataset <Dataset>	HasCreator <HasCreator>	0..n	ContactFacet <ContactFacet>	The contact information of the creator of the Dataset.
Dataset <Dataset>	HasCurator <HasCurator>	0..n	ContactFacet <ContactFacet>	The contact information of the entity responsible for the curation of the dataset.
Dataset <Dataset>	HasMaintainer <HasMaintainer>	0..n	ContactFacet <ContactFacet>	The contact information of the entity responsible for the maintenance of the dataset.
Dataset <Dataset>	HasOwner <HasOwner>	0..n	ContactFacet <ContactFacet>	The contact information of the entity having the ownership of the dataset.
Schema <Schema>	HasContact <HasContact>	1..n	ContactFacet <ContactFacet>
Site <Site>	HasContact <HasContact>	1..n	ContactFacet <ContactFacet>	The main contact for the Site.
Site <Site>	HasMaintainer <HasMaintainer>	1..n	ContactFacet <ContactFacet>	Contact information of the maintainer of the Site.
Site <Site>	HasManager <HasManager>	1..n	ContactFacet <ContactFacet>	Contact information of the Site Manager.

The ContactFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

ContactReferenceFacet

ContactReferenceFacet captures information on the primary and authoritative contact for the resource it is associated with.

ContactReferenceFacet extends Facet

Properties
Name	Type	Attributes	Description
phoneNumber	String	Mandatory:false ReadOnly:false NotNull:false	A phone number
address	String	Mandatory:false ReadOnly:false NotNull:false	A physical address
website	String	Mandatory:false ReadOnly:false NotNull:false	The main website
Known Usage
Source	Relation	Multiplicity	Target	Description
Actor <Actor>	ConsistsOf <ConsistsOf>	0..n	ContactReferenceFacet <ContactReferenceFacet>

The ContactReferenceFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

CoverageFacet

CoverageFacet captures information on the extent of the resource, i.e., any aspect aiming at capturing an indicator of the amount/area the resource covers be it a geospatial area, a temporal area, or any other 'area'. Let consider a dataset containing information regarding the salinity of a specific ocean area in a certain amount of time. What is essential in the information system is not representing the data of the salinity. Instead, to specify the temporal period and theocean area the dataset is valid. This information is captured by the CoverageFacet.

CoverageFacet extends Facet

Properties
Name	Type	Attributes	Description
coverage	ValueSchema <ValueSchema>	Mandatory:true ReadOnly:false NotNull:true	The value indicates the 'area' covered by the dataset according to the schema
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	HasCoverage <HasCoverage>	1..n	CoverageFacet <CoverageFacet>	Any coverage related information (e.g. topic, species) characterising the content of the dataset.
Dataset <Dataset>	HasSpatialCoverage <HasSpatialCoverage>	0..n	CoverageFacet <CoverageFacet>	Any geo-spatial coverage information characterising the content of the dataset, e.g. the area covered by the dataset.
Dataset <Dataset>	HasTemporalCoverage <HasTemporalCoverage>	0..n	CoverageFacet <CoverageFacet>	Any temporal coverage information characterising the content of the dataset, e.g. the time-span covered by the dataset.

The CoverageFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

DescriptiveMetadataFacet

DescriptiveMetadataFacet captures information on descriptive metadata to be associated with the resource. This facet is mainly used to attach metadata to a Dataset.

DescriptiveMetadataFacet extends Facet

Properties
Name	Type	Attributes	Description
descriptiveMetadata	ValueSchema <ValueSchema>	Mandatory:true ReadOnly:false NotNull:true	A metadata record representing the descriptive metadata according to the schema
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	DescriptiveMetadataFacet <DescriptiveMetadataFacet>	Any descriptive information associated with the dataset, e.g. for discovery purposes.
Schema <Schema>	ConsistsOf <ConsistsOf>	0..n	DescriptiveMetadataFacet <DescriptiveMetadataFacet>
Service <Service>	ConsistsOf <ConsistsOf>	0..n	DescriptiveMetadataFacet <DescriptiveMetadataFacet>	Any descriptive information associated with the service, e.g. for discovery purposes.

The DescriptiveMetadataFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

EventFacet

EventFacet captures information on a certain event/happening characterising the life cycle of the resource. Examples of an event are the start time of a virtual machine or the activation time of an electronic service.

EventFacet extends Facet

Properties
Name	Type	Attributes	Description
date	Date	Mandatory:true ReadOnly:false NotNull:true	The time the event took place/occurred
event	String	Mandatory:true ReadOnly:false NotNull:true	The typology of event
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	EventFacet <EventFacet>	Any 'event' characterising the lifecycle of the dataset, e.g. collection date, last collection date.
EService <EService>	ConsistsOf <ConsistsOf>	1..n	EventFacet <EventFacet>	Events characterising the current status and lifecycle of the service, e.g. ActivationTime, DeploymentTime.
HostingNode <HostingNode>	ConsistsOf <ConsistsOf>	1..n	EventFacet <EventFacet>	Every event characterizing the life cycle of the Hosting Node, e.g. the activation time.
VirtualMachine <VirtualMachine>	ConsistsOf <ConsistsOf>	1..n	EventFacet <EventFacet>	Every event characterizing the life cycle of the Virtual Machine, e.g. the activation time.

The EventFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

IdentifierFacet

IdentifierFacet captures information on identifiers (other than the ones automatically generated by the system) that can be attached to a resource.

IdentifierFacet extends Facet

Properties
Name	Type	Attributes	Description
identificationType	String	Mandatory:true ReadOnly:false NotNull:true Regex:^(URI|DOI|IRI|URL|URN|UUID|STRING)$	The typology of identifier
value	String	Mandatory:true ReadOnly:false NotNull:true	The identifier
perstent	Boolean	Mandatory:false ReadOnly:false NotNull:false	To indicate whether the identifier is persistent or not
Known Usage
Source	Relation	Multiplicity	Target	Description
ConfigurationTemplate <ConfigurationTemplate>	IsIdentifiedBy <IsIdentifiedBy>	1..1	IdentifierFacet <IdentifierFacet>
Dataset <Dataset>	IsIdentifiedBy <IsIdentifiedBy>	1..1	IdentifierFacet <IdentifierFacet>	The set of Identifiers associated with the Dataset instance.
Site <Site>	IsIdentifiedBy <IsIdentifiedBy>	1..1	IdentifierFacet <IdentifierFacet>	The Site Identifier.

The IdentifierFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

LicenseFacet

LicenseFacet captures information on any license associated with the resource to capture the policies governing its exploitation and use. Example of use is the licence of a dataset e.g., Creative Commons Attribution (CC-BY) or the licence of software such as GPL. This facet is used to provide for human knowledge, but it is not excluded the usage by infrastructure services which enforces the respect of the licence e.g., a service which denies the usage of a dataset with Creative Commons Attribution No-Derivatives (CC-BY-ND)licence to produce a new dataset.

LicenseFacet extends Facet

Properties
Name	Type	Attributes	Description
name	String	Mandatory:true ReadOnly:false NotNull:true	The common name of the license. e.g., European Union Public Licence (EUPL) 1.1, GNU General Public License (GPL) 2, Berkeley Software Distribution (BSD), Common Creative (CC).
textURL	String	Mandatory:true ReadOnly:false NotNull:true	The URL to the actual text of the license.
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	LicenseFacet <LicenseFacet>	The licence governing dataset exploitation. The duration of license (if any) is captured by the expiry date defined in the consistsOf relation.
EService <EService>	ConsistsOf <ConsistsOf>	0..n	LicenseFacet <LicenseFacet>	The specific terms of use governing the exploitation of the EService.

The LicenseFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

LocationFacet

LocationFacet captures information on a physical area characterising the resource it is associated with. This should not be confused with CoverageFacet <CoverageFacet>. The LocationFacet provides information of a location (eventually using latitude and longitude), instead CoverageFacet <CoverageFacet> provide a way to to define the spatial or the temporal extent the resource represent. It is mainly used to locate a data centre or to the geographic references of a legal body playing the role of an actor in the infrastructure.

LocationFacet extends Facet

Properties
Name	Type	Attributes	Description
longitude	String	Mandatory:false ReadOnly:false NotNull:false	Longitude
country	String	Mandatory:false ReadOnly:false NotNull:false	The English name of the country
latitude	String	Mandatory:false ReadOnly:false NotNull:false	Latitude
location	String	Mandatory:false ReadOnly:false NotNull:false	The City name
Known Usage
Source	Relation	Multiplicity	Target	Description
Site <Site>	ConsistsOf <ConsistsOf>	1..n	LocationFacet <LocationFacet>

The LocationFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

MemoryFacet

MemoryFacet captures information on computer memory equipping the resource and its usage. Any resource describing a computing machine must have at least two types of memories i.e., persistent and volatile. For such a reason, it has been identified the ConsistsOf relation called HasMemory <HasMemory>. It is in charge of the specialisation HasVolatileMemory <HasVolatileMemory> and HasPersistentMemory <HasPersistentMemory> to clarify the semantics of the memory.

MemoryFacet extends Facet

Properties
Name	Type	Attributes	Description
size	Long	Mandatory:false ReadOnly:false NotNull:false
used	Long	Mandatory:false ReadOnly:false NotNull:false
unit	String	Mandatory:false ReadOnly:false NotNull:false Regex:^(Byte|kB|MB|GB|TB|PB|EB|ZB|YB)$
Known Usage
Source	Relation	Multiplicity	Target	Description
HostingNode <HostingNode>	HasPersistentMemory <HasPersistentMemory>	1..n	MemoryFacet <MemoryFacet>	The Disk Space Capacity of the Hosting Node.
HostingNode <HostingNode>	HasVolatileMemory <HasVolatileMemory>	1..n	MemoryFacet <MemoryFacet>	The RAM Capacity of the Hosting Node.
VirtualMachine <VirtualMachine>	HasPersistentMemory <HasPersistentMemory>	1..n	MemoryFacet <MemoryFacet>	The Disk Space Capacity of the Virtual Machine.
VirtualMachine <VirtualMachine>	HasVolatileMemory <HasVolatileMemory>	1..n	MemoryFacet <MemoryFacet>	The RAM Capacity of the Virtual Machine.

The MemoryFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

NetworkingFacet

NetworkingFacet captures information on any (computer) network interface associated with the resource.It is mainly used to describe the network interface of a host. It should not be confused with the AccessPointFacet <AccessPointFacet> which instead describes the protocol and the endpoint of a web-based service.

NetworkingFacet extends Facet

Properties
Name	Type	Attributes	Description
IPAddress	String	Mandatory:true ReadOnly:false NotNull:true	Internet Protocol (IP) Address
domainName	String	Mandatory:false ReadOnly:false NotNull:false	Domain Name
hostName	String	Mandatory:false ReadOnly:false NotNull:false	Host Name
mask	String	Mandatory:false ReadOnly:false NotNull:false	Network Mask
broadcastAddress	String	Mandatory:false ReadOnly:false NotNull:false	Broadcast Address
Known Usage
Source	Relation	Multiplicity	Target	Description
HostingNode <HostingNode>	IsIdentifiedBy <IsIdentifiedBy>	1..1	NetworkingFacet <NetworkingFacet>	The Network ID characterising the Hosting Node.
Site <Site>	ConsistsOf <ConsistsOf>	1..n	NetworkingFacet <NetworkingFacet>
VirtualMachine <VirtualMachine>	IsIdentifiedBy <IsIdentifiedBy>	1..1	NetworkingFacet <NetworkingFacet>	The Network ID characterising the Virtual Machine.

The NetworkingFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

ProvenanceFacet

ProvenanceFacet captures information on provenance/lineage of the entire resource. It is mainly used to describe provenance information of a Dataset.

ProvenanceFacet extends Facet

Properties
Name	Type	Attributes	Description
reference	String	Mandatory:false ReadOnly:false NotNull:false	The ID of the referenced resource.
document	ValueSchema <ValueSchema>	Mandatory:false ReadOnly:false NotNull:false	Provenance Document, e.g., an XML according to the reference schema.
relationship	String	Mandatory:false ReadOnly:false NotNull:false Regex:^(wasDerivedFrom|wasGeneratedBy)$	Relationship with the resource indicated by ID. Please note that the provenance has not been modelled as IsRelatedTo specialization, because the source resource is not necessarly in the IS or could be deleted from the IS at any time.
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	ProvenanceFacet <ProvenanceFacet>	Any provenance record associated with the dataset.

The ProvenanceFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

SchemaFacet

SchemaFacet captures information on any schema, i.e., a vocabulary used to validate a document associated with a resource. Examples of schema are JavaScript Object Notation (JSON) schema and XML schema. JSON schema "is a vocabulary that allows you to annotate and validate JSON documents". JSON schema is under standardisation by Internet Engineering Task force (IETF) (see references at https://json-schema.org/specification.html). XSD defines the legal building blocks of an XML document. DTD defines the structure and the legal elements and attributes of an XML document.

SchemaFacet extends Facet

Properties
Name	Type	Attributes	Description
description	String	Mandatory:true ReadOnly:false NotNull:true	Schema Description
name	String	Mandatory:true ReadOnly:false NotNull:true	Schema Name
schema	ValueSchema <ValueSchema>	Mandatory:false ReadOnly:false NotNull:false	The 'value' property contains the defined 'schema' that in turn is validated by the schema available at the URL indicated in the ’schema’ property. An example could be an XSD schema instantiation as 'value' and the URL of the DTD defining the XSD as 'schema' i.e., https://www.w3.org/2009/XMLSchema/XMLSchema.dtd.
Known Usage
Source	Relation	Multiplicity	Target	Description
Schema <Schema>	IsIdentifiedBy <IsIdentifiedBy>	1..1	SchemaFacet <SchemaFacet>

The SchemaFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

SimpleFacet

A sort of catch all. It does not define any property. It is mainly used to one or more arbitrary properties to the resource. Before using SimpleFacet a developer should evaluate if it is possible to identify a specific Facetto capture the particular aspect of the resource. The usage of SimpleFacet should be reduced to the maximum.

SimpleFacet extends Facet

Properties
Name	Type	Attributes	Description
This type does not define any additional attributes.
Known Usage
Source	Relation	Multiplicity	Target	Description
No specific known usage for this type.

The SimpleFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

SimplePropertyFacet

Collect name-value property

SimplePropertyFacet extends Facet

Properties
Name	Type	Attributes	Description
name	String	Mandatory:true ReadOnly:false NotNull:true
value	String	Mandatory:true ReadOnly:false NotNull:true
Known Usage
Source	Relation	Multiplicity	Target	Description
HostingNode <HostingNode>	ConsistsOf <ConsistsOf>	0..n	SimplePropertyFacet <SimplePropertyFacet>	Any <key,value> pair property worth associating with the Hosting Node, e.g. Environment Variables

The SimplePropertyFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

SoftwareFacet

SoftwareFacet captures information on any software associated with the resource.

SoftwareFacet extends Facet

Properties
Name	Type	Attributes	Description
group	String	Mandatory:true ReadOnly:false NotNull:true	The name of 'group' the software artifact belongs to, e.g., groupId in maven coordinates, company name for retail software software such as 'Microsoft™' (in Microsoft™ Office 2013-SP2)
name	String	Mandatory:true ReadOnly:false NotNull:true	The name of the software artifact being described, e.g., artifactId in maven coordinates, the software name for retail software such as 'Office' (in Microsoft™ Office 2013-SP2)
version	String	Mandatory:true ReadOnly:false NotNull:true	The particular release of the software artifact, e.g., version in maven coordinates, the software version for retail software such as '2013-SP2' (in Microsoft™ Office 2013-SP2)
description	String	Mandatory:false ReadOnly:false NotNull:false	A human oriented description of the software artifact being described
qualifier	String	Mandatory:false ReadOnly:false NotNull:false	A qualifier for the software, e.g., packaging or scope in maven coordinates, target architecture for retail software such as x86 or amd64
optional	Boolean	Mandatory:false ReadOnly:false NotNull:false	Used to indicate the software optionality, e.g., optional in maven coordinates
Known Usage
Source	Relation	Multiplicity	Target	Description
EService <EService>	ConsistsOf <ConsistsOf>	0..n	SoftwareFacet <SoftwareFacet>	Software available in the EService environment that characterizes the specific EService instance.
EService <EService>	IsIdentifiedBy <IsIdentifiedBy>	1..1	SoftwareFacet <SoftwareFacet>	The main software enabling the EService capabilities.
HostingNode <HostingNode>	ConsistsOf <ConsistsOf>	0..n	SoftwareFacet <SoftwareFacet>	Any Software characterising the Hosting Node. Useful to report the hosted software that are not registered in the Resource Registry as Software Resource, e.g. Operating System
Software <Software>	ConsistsOf <ConsistsOf>	1..n	SoftwareFacet <SoftwareFacet>	Apart the one connected by the IsIdentifiedBy relation (gCube coordinates) the others identify the software in other way e.g. (Maven coordinates).
Software <Software>	IsIdentifiedBy <IsIdentifiedBy>	1..1	SoftwareFacet <SoftwareFacet>	Software coordinates which identify the Software per se.
VirtualMachine <VirtualMachine>	ConsistsOf <ConsistsOf>	0..n	SoftwareFacet <SoftwareFacet>	Any Software characterising the Virtual Machine. Useful to report the hosted software that are not registered in the Resource Registry as Software Resource, e.g. Operating System
VirtualService <VirtualService>	IsIdentifiedBy <IsIdentifiedBy>	1..n	SoftwareFacet <SoftwareFacet>

The SoftwareFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

StateFacet

StateFacet captures information on state to be associated with the resource. The state is captured by any controlled vocabulary which is an integral part of the facet. Examples of usage are the state of service e.g., running or down or the state of a virtual machine e.g., activated or unreachable.

StateFacet extends Facet

Properties
Name	Type	Attributes	Description
value	String	Mandatory:true ReadOnly:false NotNull:true	The value of the state
Known Usage
Source	Relation	Multiplicity	Target	Description
EService <EService>	ConsistsOf <ConsistsOf>	1..1	StateFacet <StateFacet>	The current status of the EService, e.g. STARTED, ready, down, failed.
HostingNode <HostingNode>	ConsistsOf <ConsistsOf>	1..1	StateFacet <StateFacet>	The current state of the Hosting Node, e.g. started, ready, certified, down, failed.
VirtualMachine <VirtualMachine>	ConsistsOf <ConsistsOf>	1..1	StateFacet <StateFacet>	The current state of the Virtual Machine, e.g. started, ready, down, unreachable.

The StateFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

SubjectFacet

SubjectFacet captures information on subjects associated with the resource for description, classification and discovery purposes.

SubjectFacet extends Facet

Properties
Name	Type	Attributes	Description
subject	ValueSchema <ValueSchema>	Mandatory:true ReadOnly:false NotNull:true	The value of the subject according to the schema
Known Usage
Source	Relation	Multiplicity	Target	Description
Dataset <Dataset>	ConsistsOf <ConsistsOf>	0..n	SubjectFacet <SubjectFacet>	Any subject/tag associated with the dataset for descriptive and discovery purposes.
Schema <Schema>	ConsistsOf <ConsistsOf>	0..n	SubjectFacet <SubjectFacet>
Service <Service>	ConsistsOf <ConsistsOf>	0..n	SubjectFacet <SubjectFacet>	Any subject/tag associated with the service for descriptive, cataloguing and discovery purposes.

The SubjectFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.

TemplateFacet

This facet define a template for a Facet to instantiate using the list of attributes specified. The type of the instatianted facet is specified in 'targetFacetType' attribute

TemplateFacet extends Facet

Properties
Name	Type	Attributes	Description
attributes	List<AttributeProperty <AttributeProperty>>	Mandatory:true ReadOnly:false NotNull:true	The attributes of the template to be created when instantiated
description	String	Mandatory:true ReadOnly:false NotNull:true	The description of the template
name	String	Mandatory:true ReadOnly:false NotNull:true	The name of the template
targetFacetType	String	Mandatory:true ReadOnly:false NotNull:true	The type of Facet to instantiate with the attributes valued
Known Usage
Source	Relation	Multiplicity	Target	Description
ConfigurationTemplate <ConfigurationTemplate>	ConsistsOf <ConsistsOf>	0..n	TemplateFacet <TemplateFacet>

The TemplateFacet current version is 1.0.0.

Changelog:

• 1.0.0: First Version.