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Proxy vocabulary

{{#eclipseproject:technology.higgins|eclipse_custom_style.css}} A proxy is an object that stands in for a "real" object that is stored in the local Attribute Data Store (ADS). The proxy's proxy:resource URI that is a link to the "real" object. To support a visual representation of a proxy, proxies have optional background color, image and imageType attributes.

Subclasses of Proxy exist that add a second reference--a reference to an object stored external to the local ADS. Specific subclasses indicate the protocol used to access it, and any authentication materials required).

Part of the Persona Data Model 2.0.


UML Overview




An App Proxy references an h:Agent (usually a p:Person) that an App (a PDS add-on) can use for local storage.

  • subClassOf Proxy
  • description xsd:String


Abstract class. A metaphor representing an attribute data channel to/from an external party. The connectionType attribute indicates the nature of the party on the other end of the connection.

  • subClassOf Proxy
  • 1..1 externalResource
  • 1..1 connectionType

Known subclasses of Connection: I-Card (See I-Card vocabulary), WebLogin, LinkedData, XRI2.0


Values of emailRelationship attribute. Instances:

  • Account : User receives emails from a registered account at the site of this WebLogin connector.
  • Forwarded : User receives emails from the site of this WebLogin that are forwarded from an external email inbox
  • SharedSubscription : User has no direct email relationship with the site of this WebLogin but instead is delivered copies of the emails received by some other entity.
  • Subscription : User is subscribed to the mailling list of the site of this WebLogin.


Abstract class. A categorization of the proxy:Connection todo: list subclasses


A reference to an external representation (e.g. a person) stored as Linked Data in the Semantic Web (probably using FOAF). See ( The value of its inherited externalResource attribute is a LinkedData URI (303 or Hash)

  • subClassOf Connection


A connection that uses HTML screen scraping and form filling to read/write from/to an external website. The 'externalResource' is the URI of the homepage of this site. If login is required then userid and password are the values required to login.

  • subClassOf: Connection
  • 0..1 invalidCredentials
  • 0..1 neverRememberPassword
  • 0..1 password
  • 0..1 userid
  • 0..1 loginPage
  • 0..1 registerPage
  • 0..1 subscribePage
  • 0..1 hasConnector
  • 0..1 sendsEmails


A (abstract) proxy for an object that is stored external to the local data store. Concrete subclasses of Proxy specify how this external object it accessed (e.g. by specifying location of the object, the used protocol to access it, and any authentication materials required). Each Proxy instance has a resource attribute that is a reference to a representation of the external object in a context in the local data store. Some Proxies may be represented as visual icons/metaphors in a UI. To support this it has optional background color, image/imageType or imageURL attributes

  • 1..1 displayName
  • 1..1 resource
  • 1..1 template
  • 0..1 backgroundColor
  • 0..1 image
  • 0..1 imageType
  • 0..1 imageURL


A reference to an external representation (e.g. a person). The value of the inherited externalReference attribute is an XRI 2.0 URI. Dereferences to an XRDS discovery document.

  • subClassOf Card
  • 0..1 app-data:appData - provides a "template" for the AppData object within a dynamically created AppDataContext (see App-data vocabulary)
  • 1..1 authNMaterialsType
  • 1..1 contextType
  • 0..1 udiMetadata


A set of attribute/values that, taken together, are considered the "metadata" for the XRDS service endpoint.

Connection Attributes


URI of a resource external to the ADS. Different Connection subclasses interpret this differently.

  • value: xsd:anyURI


Categorization of the external resource party.

  • domain: Connection
  • value: ConnectionType

WebLogin Attributes


DND domain name of this site (e.g.

  • value: xsd:string


Nature of the relationship the user has with this WebLogin's externalResource especially WRT email communications.

  • domain: WebLogin
  • value: EmailRelationshipType


If true this PDS instance is deployed with a connector that can integrate with the external object

  • value: xsd:boolean


Optional URL of background image. An alternative to the embedded image/imageType attributes.

  • value: foaf:Image


If true, then some attempt has been made to use the userid/password but the login failed.

  • domain: WebLogin
  • value: xsd:boolean


URL of a page where a user can login to this site.

  • value: Entity


If true then don't ever capture/remember the password that the user just typed in.

  • domain: WebLogin
  • value: xsd:boolean


The userid (that is also an email address) that had been used BEFORE the current value (see 'userid') is used by an external site to identify the user. E.g. If the user had used a ChangeEmail connector script and changed their email in their account at from to, then would be the oldUserid.

  • domain: WebLogin
  • value: p:emailDatatype


Password used in conjunction with userid to login user.

  • domain: WebLogin
  • value: xsd:string


URL of a page where the user can register for a new account at this site.

  • value: Entity


If true the external website sends emails to those on its mailing list

  • value: xsd:boolean


URL of a page where the user can subscribe to emails from this site.

  • value: Entity


A userid (that is also an email address) used by an external site to identify the user. E.g.

  • domain: WebLogin
  • value: p:emailDatatype


A userid (that is not an email address) used by an external site to identify the user. E.g. "john53"

  • domain: WebLogin
  • value: xsd:string

Proxy Attributes


Background image of a Proxy/Card.

  • value: xsd:string


Short human-friendly name for this Proxy.

  • value: xsd:string


  • value: xsd:base64


  • one of ("JPG", "GIF", "PNG")


Entity stored in local data store that is a local representation of the external object represented by this Proxy.

  • value: higgins:Agent

XRI 2.0 Attributes



UDIMetadata instance

  • domain: XRI2.0
  • value: UDIMetadata


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