LibSip currently supports data type (SIP headers) that are based/defined in the following standards:
- RFC 3261 SIP: Session Initiation Protocol
 - RFC 3262 Reliability of Provisional Responses in the Session Initiation Protocol (SIP)
 - RFC 3265 Session Initiation Protocol (SIP)-Specific Event Notification
 - RFC 3313 Private Session Initiation Protocol (SIP) Extensions for Media Authorization
 - RFC 3323 A Privacy Mechanism for the Session Initiation Protocol (SIP)
 - RFC 3325 Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks
 - RFC 3326 The Reason Header Field for the Session Initiation Protocol (SIP)
 - RFC 3327 Session Initiation Protocol (SIP) Extension Header Field for Registering Non-Adjacent Contacts
 - RFC 3329 Security Mechanism Agreement for the Session Initiation Protocol (SIP)
 - RFC 3455 Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3rd-Generation Partnership Project (3GPP)
 - RFC 3515 The Session Initiation Protocol (SIP) Refer Method
 - RFC 3608 Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration
 - RFC 3841 Caller Preferences for the Session Initiation Protocol (SIP)
 - RFC 3891 The Session Initiation Protocol (SIP) "Replaces" Header
 - RFC 3892 The Session Initiation Protocol (SIP) Referred-By Mechanism
 - RFC 4028 Session Timers in the Session Initiation Protocol (SIP)
 - RFC 4244 An Extension to the Session Initiation Protocol (SIP) for Request History Information
 - RFC 4488 Suppression of Session Initiation Protocol (SIP) REFER Method Implicit Subscription
 - RFC 4566 SDP Session Description Protocol
 - RFC 4786 The Session Description Protocol (SDP) Content Attribute (in preparation)
 - RFC 5009 Private Header (P-Header) Extension to the Session Initiation Protocol (SIP) for Authorization of Early Media
 - draft-johnston-sipping-cc-uui-07 SIP UUI for CC
 - RFC 6442 Location Conveyance for the Session Initiation Protocol
 
The following table provides an overview to supporting files that contain type definitions found in various standardized specifications:
					
						XSD module (currently used)
				 | 
				
					Function (latest reference) | 
			
| 
					CDIVN http_uri_etsi_org_ngn_params_xml_comm_div_info  | 
				Communication Diversion Notification (24604_cdivn.xsd) (ETSI TS 124 604), V10.7.0 (2013-10) | 
| 
					MCID http_uri_etsi_org_ngn_params_xml_simservs_mcid  | 
				Malicious Communication Identification (ETSI TS 124 516), V8.3.0 (2010-10) | 
| 
					PSTN http_uri_etsi_org_ngn_params_xml_simservs_pstn  | 
				Public Switched Telephone Network (ETSI TS 124 503), V8.5.0 (2009-06) | 
| 
					ACR_CB  http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Anonymous Call Rejection – Communication Barring (ETSI TS 124 411), V8.3.0 (2012-01) | 
| 
					CDIV  http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Communication Diversion (24604.xsd) (ETSI TS 124 604), V10.7.0 (2013-07) | 
| 
					CUG http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Closed User Group (ETSI TS 124 454), V8.3.0 (2012-07) | 
| 
					OIP-OIR http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Originating Identification Presentation/Restriction (ETSI TS 124 607), V10.0.0 (2011-05) | 
| 
					Simservs http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Data Manipulation of ETSI NGN PSTN/ISDN Simulation Services (ETSI TS 124 423), V8.5.0 (2012-03) | 
| 
					TIP_TIR http_uri_etsi_org_ngn_params_xml_simservs_xcap  | 
				Terminating Identification presentation/restriction (ETSI TS 124 508), V8.1.0 (2008-06) | 
| 
					Xml http_www_w3_org_XML_1998_namespace  | 
				XML Namespace (www.w3.org/2007/08/xml.xsd) | 
| 
					Ims3gpp NoTargetNamespace  | 
				Alternative Service (ETSI TS 124 699: 3GPP TS 24.615, V8.0.1 (2009-01)) | 
| 
					CW urn_3gpp_ns_cw_1_0  | 
				Communication Waiting (ETSI TS 124 615), V10.5.0 (2014-01) | 
| 
					CONF urn_ietf_params_xml_ns_conference_info  | 
				Conference (RFC 4575) | 
| 
					common-policy urn_ietf_params_xml_ns_common_policy  | 
				Common policy (RFC 4745) | 
| 
					PIDF urn_ietf_params_xml_ns_pidf  | 
				Presence Information Data Format (RFC 3863), errata exists | 
| 
					PIDF_lo urn_ietf_params_xml_ns_pidf_geopriv10  | 
				Presence Information Data Format (RFC4119, 1st schema), errata exists | 
| 
					GEOPRIV urn_ietf_params_xml_ns_pidf_geopriv10_basicPolicy  | 
				GEOPRIV Location Object (RFC4119, 2nd schema), errata exists | 
| 
					regInfo urn_ietf_params_xml_ns_reginfo  | 
				SIP Registrations Event (RFC 3680) | 
| 
					ResourceList urn_ietf_params_xml_ns_resource_lists  | 
				Formats for Representing Resource Lists (RFC 4826), errata exists | 
| 
					xdm_commonPolicy urn_oma_xml_xdm_common_policy  | 
				XML Document Management (xdm_commonPolicy-v1_0.xsd) | 
| n/a (planned) | Civic Location (RFC4119, 3rd schema), errata exists | 
| 
					Gruuinfo (planned)  | 
				Globally Routable User Agent URIs (gruuinfo) (RFC 5628), errata exists | 
| n/a (planned) | "Emergency service" for 380 alternative service (3GPP IM CN Subsystem XML body handling, 3GPP TS 24.229 V10.10.0 (2012-12)) | 
| n/a (planned) | Message-event summary package (RFC 3842) | 

