1. Notification and Discovery
Continuation BOF
PROVO – December 2003

2. 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)

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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