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+Name
+
+    NV_system_time
+
+Name Strings
+
+    EGL_NV_system_time
+
+Contact
+
+    Jason Allen, NVIDIA Corporation (jallen 'at' nvidia.com)
+
+Status
+
+    TBD
+
+Version
+
+    Version 1, July 7, 2011
+
+Number
+
+    EGL Extension #31
+
+Dependencies
+
+    Requires EGL 1.2
+
+Overview
+
+    This extension exposes an alternative method of querying the system time
+    from the driver instead of the operating system. 
+
+Issues
+
+    Add 64 bit types?
+
+      Yes, EGL doesn't support any 64 bit types so this extension adds int64
+      and uint64 types.
+
+New Types
+
+    EGLint64NV: 64bit signed integer
+    EGLuint64NV: 64bit unsigned integer
+
+New Procedures and Functions
+
+    EGLuint64NV eglGetSystemTimeFrequencyNV(void);
+    EGLuint64NV eglGetSystemTimeNV(void);
+
+New Tokens
+
+    None
+
+Description
+
+    The command:
+
+        EGLuint64NV eglGetSystemTimeFrequencyNV(void);
+
+    returns the frequency of the system timer, in counts per second. The
+    frequency will not change while the system is running.
+
+    The command:
+
+        EGLuint64NV eglGetSystemTimeNV(void);
+
+    returns the current value of the system timer. The system time in seconds
+    can be calculated by dividing the returned value by the frequency returned
+    by the eglGetSystemTimeFrequencyNV command.
+
+    Multiple calls to eglGetSystemTimeNV may return the same values, applications
+    need to be careful to avoid divide by zero errors when using the interval
+    calculated from successive eglGetSystemTimeNV calls.
+
+Usage Example
+
+    EGLuint64NV frequency = eglGetSystemTimeFrequencyNV();
+
+    loop
+    {
+        EGLuint64NV start = eglGetSystemTimeNV() / frequency;
+
+        // draw 
+
+        EGLuint64NV end = eglGetSystemTimeNV() / frequency;
+
+        EGLuint64NV interval = end - start;
+        if (interval > 0)
+            update_animation(interval);
+
+        eglSwapBuffers(dpy, surface);
+    }
+
+Revision History
+
+#1 (Jon Leech, 2011/07/07)
+  - Add missing fields, assign extension number, and publish in the registry.
+