Notification and Discovery Continuation BOF PROVO – December 2003

Device Discovery Best Practices and Templates NOT invention SLP (with IETF template) LDAP (with IETF schema) Active Directory (with Microsoft schema) NDS (with Novell schema) SNMP (basis for many printer discov applns) UPnP SSDP or wherever they are going… Apple Rendezvous / DNSsd UDDI “T Model” (for public print services) Alignment achieved between SLP, LDAP, SNMP and PWG Semantic Model IANA registered LDAP schema (recent)

Discovery Domains Home – SOHO (Non-routed sub net) Enterprise Global Rendezvous, SSDP, SLP, SNMP Enterprise SLP, LDAP, Active Directory, NDS, *SNMP, *DNSsd, *SSDP Global UDDI Currently not standardized * May not be optimal for this domain

Discovery Guide Need PWG Discovery Best Practice working draft PSI Implementers guide? WBMM Implementers guide? IFX Implementers guide? PWG informative guide for how to construct discovery queries / responses Recommend capabilities subsets to enhance interoperability Recommend order of use for discovery protocols within a domain type

Discovery - Things to Do UDDI Print Services Technology Watch Most effective when based on experience or actual market need Example - invite print providers to contribute Billing, cost estimates Outside of our domain? Types of print services Production Quick copy Photo CPXe Public Extract best practice working draft from PSI discovery section Do this before advancing PSI Implementers guide if possible

Capabilities Navigation and Description UPnP DDD – pointer to SCPD W3C WSIL Description UPnP SCPD Combination of service interface and description Not used in practice to learn capabilities Semantic Model Subset Directory entries

Notification Topics Establish industry specific semantics for notification Consolidate subscription attributes from various delivery methods Develop Subscription and Notification schema Correlate with existing notification / messaging protocols Update PWG Semantic Model Existing / emerging messaging protocols XMPP (Instant Messaging), W3C, Oasis, UPnP GENA Role of Notification server (service) Possible printer-service-proxy protocol Printer MIB top 25 – commonly instrumented events Wireless eventing architectures

PWG Notifications Status IPP Nofitication Base spec, IPP GET, INDP and MailTo submitted to IETF INDP and MailTo rejected as push security methods Base spec scrutinized for allowing push notification Push methods with no SPAM protection CUPS 1.2 will ship MAILTO and INDP PSI and IFX Server directed polling Added in Provo Similar to IPP GET Consider making ISTO standard Base spec has been converted Needs PSI, IPP FAX and administrative updates PSI Job State Change only event (buffers out reasons) IPP FAX Job Progress warning / error filtering Administrative job forwarded operation failed Need to convert IPP GET, INDP and MailTo Include Client best practices or conformance guide