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diff --git a/java/gov/nist/javax/sip/header/ims/PAssertedServiceHeader.java b/java/gov/nist/javax/sip/header/ims/PAssertedServiceHeader.java
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+++ b/java/gov/nist/javax/sip/header/ims/PAssertedServiceHeader.java
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+package gov.nist.javax.sip.header.ims;
+/*
+* Conditions Of Use
+*
+* This software was developed by employees of the National Institute of
+* Standards and Technology (NIST), an agency of the Federal Government.
+* Pursuant to title 15 Untied States Code Section 105, works of NIST
+* employees are not subject to copyright protection in the United States
+* and are considered to be in the public domain.  As a result, a formal
+* license is not needed to use the software.
+*
+* This software is provided by NIST as a service and is expressly
+* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
+* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
+* AND DATA ACCURACY.  NIST does not warrant or make any representations
+* regarding the use of the software or the results thereof, including but
+* not limited to the correctness, accuracy, reliability or usefulness of
+* the software.
+*
+* Permission to use this software is contingent upon your acceptance
+* of the terms of this agreement
+*
+* .
+*
+*/
+import javax.sip.header.Header;
+/**
+ *
+ * @author aayush.bhatnagar
+ * Rancore Technologies Pvt Ltd, Mumbai India.
+ *
+ * The ABNF for this header is all follows:
+ *
+ *  PAssertedService = "P-Asserted-Service"
+ *                       HCOLON PAssertedService-value
+ *
+ *  PAssertedService-value = Service-ID *(COMMA Service-ID)
+ *
+ *  where,
+ *
+ *     Service-ID      = "urn:urn-7:" urn-service-id
+ *     urn-service-id  = top-level *("." sub-service-id)
+ *     top-level       = let-dig [ *26let-dig ]
+ *     sub-service-id  = let-dig [ *let-dig ]
+ *     let-dig         = ALPHA / DIGIT / "-"
+ *
+ * Egs: P-Asserted-Service: urn:urn-7:3gpp-service.exampletelephony.version1
+ *      P-Asserted-Service: urn:urn-7:3gpp-application.exampletelephony.version1
+ *
+ */
+public interface PAssertedServiceHeader extends Header{
+
+    public static final String NAME = "P-Asserted-Service";
+
+    public void setSubserviceIdentifiers(String subservices);
+
+    public String getSubserviceIdentifiers();
+
+    public void setApplicationIdentifiers(String appids);
+
+    public String getApplicationIdentifiers();
+}