</xs:complexType>
<xs:complexType name="RemoveLocationType">
<xs:complexContent>
<xs:extension base="ModifierType">
<xs:group ref="Node"/>
<xs:attribute name="location" type="xs:string"
use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="LogAction">
<xs:complexContent>
<xs:extension base="ActionType">
<xs:group ref="Node"/>
<xs:attribute name="name" type="xs:string" use="optional"/>
<xs:attribute name="comment" type="xs:string"
use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="log" type="LogAction"
substitutionGroup="action"/>
<xs:complexType name="IncomingType">
<xs:complexContent>
<xs:extension base="TopLevelActionType"/>
</xs:complexContent>
</xs:complexType>
<xs:element name="incoming" type="IncomingType"
substitutionGroup="toplevelaction"/>
<xs:complexType name="OutgoingType">
<xs:complexContent>
<xs:extension base="TopLevelActionType"/>
</xs:complexContent>
</xs:complexType>
<xs:element name="outgoing" type="OutgoingType"
substitutionGroup="toplevelaction"/>
<xs:complexType name="ProxyAction">
<xs:complexContent>
<xs:extension base="ActionType">
<xs:all>
<xs:element name="busy" minOccurs="0">
<xs:complexType>
<xs:group ref="Node"/>
</xs:complexType>
</xs:element>
<xs:element name="noanswer" minOccurs="0">
<xs:complexType>
<xs:group ref="Node"/>
</xs:complexType>
</xs:element>
<xs:element name="failure" minOccurs="0">
<xs:complexType>
<xs:group ref="Node"/>
</xs:complexType>
</xs:element>
<xs:element name="redirection" minOccurs="0">
<xs:complexType>
<xs:group ref="Node"/>
</xs:complexType>
</xs:element>
<xs:element name="default" minOccurs="0">
<xs:complexType>
<xs:group ref="Node"/>
</xs:complexType>
</xs:element>
</xs:all>
<xs:attribute name="timeout" type="xs:positiveInteger"
use="optional" default="20"/>
<xs:attribute name="recurse" type="YesNoType"
use="optional" default="yes"/>
<xs:attribute name="ordering" type="OrderingType"
use="optional" default="parallel"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="proxy" type="ProxyAction"
substitutionGroup="action"/>
<xs:complexType name="RedirectAction">
<xs:complexContent>
<xs:extension base="ActionType">
<xs:attribute name="permanent" type="YesNoType"
default="no"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="redirect" type="RedirectAction"
substitutionGroup="action"/>
<xs:complexType name="RejectAction">
<xs:complexContent>
<xs:extension base="ActionType">
<xs:attribute name="status" type="StatusType"
use="required"/>
<xs:attribute name="reason" type="xs:string"
use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="reject" type="RejectAction"
substitutionGroup="action"/>
<xs:complexType name="MailAction">
<xs:complexContent>
<xs:extension base="ActionType">
<xs:group ref="Node"/>
<xs:attribute name="url" type="xs:anyURI" use="required"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="mail" type="MailAction"
substitutionGroup="action"/>
<xs:complexType name="SubAction">
<xs:attribute name="ref" type="xs:string" use="required"/>
</xs:complexType>
<xs:complexType name="AncillaryType"/>
<xs:complexType name="SubactionType">
<xs:group ref="Node"/>
<xs:attribute name="id" use="required"/>
</xs:complexType>
<xs:complexType name="CPLType">
<xs:sequence>
<xs:element name="ancillary" type="AncillaryType" minOccurs="0"
maxOccurs="1"/>
<xs:element name="subaction" type="SubactionType" minOccurs="0"
maxOccurs="unbounded"/>
<xs:element ref="toplevelaction" minOccurs="0"
maxOccurs="unbounded">
<xs:annotation>
<xs:documentation>Any toplevel action MUST NOT appear more
than once.</xs:documentation>
</xs:annotation>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:element name="cpl" type="CPLType"/>
</xs:schema>
END
Normative References
[1] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A.,
Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP:
Session Initiation Protocol", RFC 3261, June 2002.
[2] Bray, T., Paoli, J., Sperberg-McQueen, C. M., Maler, E., and F.
Yergeau, "Extensible Markup Language (XML) 1.0 (Third Edition)",
W3C Recommendation REC-xml-20040204, World Wide Web Consortium
(W3C), February 2004. Available at http://www.w3.org/XML/.
[3] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
[4] Hinden, R. and S. Deering, "Internet Protocol Version 6 (IPv6)
Addressing Architecture", RFC 3513, April 2003.
[5] Davis, M. F. and M. Duerst, "Unicode Normalization Forms",
Unicode Standard Annex #15, Unicode Consortium, April 2003.
Revision 23; part of Unicode 4.0.0. Available at
http://www.unicode.org/unicode/reports/tr15/.
[6] Davis, M. F., "Case Mappings", Unicode Standard Annex #21,
Unicode Consortium, March 2001. Revision 5; part of Unicode
3.2.0. Available at
http://www.unicode.org/unicode/reports/tr21/.
[7] Alvestrand, H., "Tags for the Identification of Languages", BCP
47, RFC 3066, January 2001.
[8] Dawson, F. and D. Stenerson, "Internet Calendaring and
Scheduling Core Object Specification (iCalendar)", RFC 2445,
November 1998.
[9] Eggert, P., "Sources for Time Zone and Daylight Saving Time
Data". Available at http://www.twinsun.com/tz/tz-link.htm.
[10] Mealling, M. and R. Daniel, "URI Resolution Services Necessary
for URN Resolution", RFC 2483, January 1999.
[11] Bray, T., Hollander, D., and A. Layman, "Namespaces in XML", W3C
Recommendation REC-xml-names-19990114, World Wide Web Consortium
(W3C), January 1999. Available at http://www.w3.org/TR/REC-
xml-names/.
[12] Moats, R., "URN Syntax", RFC 2141, May 1997.
[13] Moats, R., "A URN Namespace for IETF Documents", RFC 2648,
August 1999.
[14] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January
2004.
[15] Murata, M., St.Laurent, S., and D. Kohn, "XML Media Types", RFC
3023, January 2001.
Informative References
[16] International Telecommunication Union, "Packet-based multimedia
communication systems", Recommendation H.323, Telecommunication
Standardization Sector of ITU, Geneva, Switzerland, July 2003.
[17] Lennox, J. and H. Schulzrinne, "Call Processing Language
Framework and Requirements", RFC 2824, May 2000.
[18] Raggett, D., Le Hors, A., and I. Jacobs, "HTML 4.01
Specification", W3C Recommendation REC-html401-19991224, World
Wide Web Consortium (W3C), December 1999. Available at
http://www.w3.org/TR/html4/.
[19] ISO (International Organization for Standardization),
"Information processing -- Text and office systems -- Standard
Generalized Markup Language (SGML)", ISO Standard ISO
8879:1986(E), International Organization for Standardization,
Geneva, Switzerland, October 1986.
[20] ISO (International Organization for Standardization), "Data
elements and interchange formats -- Information interchange --
Representation of dates and times", ISO Standard ISO
8601:2000(E), International Organization for Standardization,
Geneva, Switzerland, December 2000.
[21] DeRose, S., Maler, E., Orchard, D., and B. Trafford, "XML
Linking Language (XLink) Version 1.0", W3C Recommendation REC-
xlink-20010627, World Wide Web Consortium (W3C), June 2001.
Available at http://www.w3.org/TR/xlink/.
[22] Showalter, T., "Sieve: A Mail Filtering Language", RFC 3028,
January 2001.
[23] International Telecommunication Union, "Digital Subscriber
Signalling System No. 1 (DSS 1) - ISDN user-network interface
layer 3 specification for basic call control", Recommendation
Q.931, International Telecommunication Union, Geneva,
Switzerland, March 1993.
[24] Levin, O., "H.323 Uniform Resource Locator (URL) Scheme
Registration", RFC 3508, April 2003.
Authors’ Addresses
Jonathan Lennox
Dept. of Computer Science
Columbia University
1214 Amsterdam Avenue, MC 0401
New York, NY 10027
USA
EMail: lennox@cs.columbia.edu
Xiaotao Wu
Dept. of Computer Science
Columbia University
1214 Amsterdam Avenue, MC 0401
New York, NY 10027
USA
EMail: xiaotaow@cs.columbia.edu
Henning Schulzrinne
Dept. of Computer Science
Columbia University
1214 Amsterdam Avenue, MC 0401
New York, NY 10027
USA
EMail: schulzrinne@cs.columbia.edu
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