W3C DSig Workshop1 COSMOS - Electronic Contracting Michael Merz Ponton Hamburg.

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Presentation transcript:

W3C DSig Workshop1 COSMOS - Electronic Contracting Michael Merz Ponton Hamburg

W3C DSig Workshop2 Problems with Contracts on Paper Contracts are complex Collaborative editing not supported No formal validation possible Difficult to verify signatory/proxy relationships Media beak: No integration into business processes

W3C DSig Workshop3 Electronic Contracts An Electronic Contract... is a well-structured document From the perspective of formatting Semantically is edited/viewed in different contexts Composition, Printing, Visualisation, Signing consists of standard elements plus individual extensions needs to be exchanged may be manipulated in a collaborative session is signed by attaching signatures in a standardized way

W3C DSig Workshop4 COSMOS Architecture Offer Database Contract Template Database Market Participant Offer / Inquiry Offer Selection Negotiation Signing Process Description

W3C DSig Workshop5 Why XML Contracts fit well to be represented in XML Several COSMOS areas require exchange of structured business data Profiles Offers / Inquiries Contracts Signatures Workflow execution This data need to be visualized in various forms: On-screen vs. printed In edit vs. in view mode Separated vs. compound

W3C DSig Workshop6 The COSMOS Contract Model

W3C DSig Workshop7 Signing Contracts Party1... Party NCOSMOS Notary Chamber Of Commerce Negotiation Phase I Agree Please Sign [ ] Signature, Certificate, Credential Check Signatories Notary‘s Signature Notarisation + + Execution Phase

W3C DSig Workshop8 Modeling, Composition, Visualisation, Signing (The big picture) COSMOS Contract Model (UML) COSMOS DTD (XML) EU Contract (Text) EU Contract (Semi Structured) Formalisation EU Contract (XML) COSMOS Contract Style Sheet (XSL) EU Contract Contracts as such... WFM PKI (HTML)

W3C DSig Workshop9 Standardization Requirements General Contract DTD Contract XSL stylesheets (Print, Screen) Specific Signature DTD Certificate DTD Product Description DTD Attribute Certificates (Signatory, Rating,...) Expressing/verifying complex authority statement Contract vs. Product Specification Embed / refer to document with Product Spec. schema ToDo: standardizing the vocabulary for assertion statements