Ws-policy

Ws-policy

WS-Policy

WS-Policy est une grammaire flexible et extensible qui permet d'exprimer les possibilités, exigences, et caractéristiques générales d'entités dans un système basé sur les services web XML. WS-Policy définit un cadre et un modèle pour l'expression de ces propriétés en tant que policies.

En particulier, WS-policy est une spécification qui permet :

  • aux consommateurs de services web de définir leurs capacités en matière de policies (sur la sécurité, la qualité de service, etc.)
  • aux fournisseurs de services web de spécifier leurs exigences en matière de policies

WS-Policy a été soumis au W3C le 25 avril 2006 et a atteint le statut de 'recommendation' le 4 septembre 2007.

WS-Policy représente un ensemble de spécifications qui décrit les possibilités et les contraintes des policies de sécurité (et d'autres domaines) sur les intermédiaires et les points finaux (end points), par exemple, gages sur la sécurité exigée, algorithmes de chiffrement supportés, et règles sur la vie privée) et comment associer des policies à des services et des points de livraison finale (end points).

Sommaire

Policy Assertion

Assertions can either be requirements put upon a web service or an advertisement of the policies of a web service.

Operator tags

Two "operators" (XML tags) are used to make statements about policy combinations:

  • wsp:ExactlyOne - asserts that only one child node must be satisfied.
  • wsp:All - asserts that all child nodes must be satisfied.

Logically, an empty wsp:All tag makes no assertions.

Policy Intersection

The policy intersection is a semantic (as opposed to syntactic) intersection of two policies. The intersection is a new policy that complies with both their requirements/capabilities - or, if the policies are incompatible, this is discovered by both parties.

Voir aussi

Articles connexes

Liens externes

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