A 34 Examples 35 Abstract data model 35 22 30 F 29 13 14 B FileDiscoveryAttempt 27 22 20 28 27 C 27 25 17 26 25 26 25 27 14 17 51 23 Client 28 22 FileSearchRequest timeout ( 25, 27) 27 26 G 27 26 32 28 7 25 15 25 27 H 26 26 27 HEAD-REQUEST ( 21, 34) 25 34 15 21 28 triggered events 27 25 31 D HTTP header fields ( 19, 19) 19 32 Data model - abstract 22 I 30 15 DISCOVERY-REQUEST ( 19, 32) 45 32 45 19 8 Download Initialization 28 25 27 31 27 7 24 26 L 26 27 Local events DOWNLOAD-REQUEST ( 20, 33) 27 33 34 20 M E 19 32 Message processing Events 26
A Abstract data model 22 30 29 13 B 20 C 17 25 25 14 51 Client 22 27 26 27 26 28 25 25 27 26 26 27 25 15 28 27 D Data model - abstract 22 30 15 DISCOVERY-REQUEST ( 19, 32) 32 19 Download 28 27 27 24 26 26 27 DOWNLOAD-REQUEST ( 20, 33) 33 20 E 32 Events 34 Examples 35 35 F 14 FileDiscoveryAttempt 27 22 28 27 27 25 26 26 27 17 23 28 FileSearchRequest timeout ( 25, 27) G 32 7 15 H HEAD-REQUEST ( 21, 34) 34 21 triggered events 25 31 HTTP header fields ( 19, 19) 19 32 I 45 45 8 Initialization 25 31 7 L Local events 27 34 M 19 Message processing 26