Multipart Entry Header types

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Perry Nguyen
New member
Username: Pfn

Post Number: 1
Registered: 10-2006
Posted on Wednesday, October 11, 2006 - 04:50 pm:   


I'm writing a basic MMS parser and I don't understand how to discern when an entry header has WKPA parameters or the "normal" Header fields per Appendix A tables 38 and 39

03 42 83 0f nEntries, headerLen (66), dataLen (399)

1f21 6170 706c 6963 6174 696f 6e2f 736d 696c 00
Length-quote and Content-type (application/smil)

81 ea WKPA or Header field 0x01 (accept-)charset 0x6a?
85 0x05 WKPA Name (deprecated)?
6d6d 732e 736d 696c 2e74 7874 00 (mms.smil.txt)

8e Header field 0x0E Content-Location
6d6d 732e 736d 696c 2e74 7874 00

c0 Header field 0x40 Content-ID
223c 6d6d 732e 736d 696c 2e74 7874 3e0
"-prefixed string (<mms.smil.txt>)

The above sequence is the actual multipart header from a message from my Motorola V3 (stopping at the start of the data).

What I don't understand is, why is there a sudden change from WKPA to Header field values? There is no shift sequence. I don't see anywhere in the specification that says WKPA are for certain entries and I don't know what's going on.

New member
Username: Alice766

Post Number: 1
Registered: 05-2010
Posted on Thursday, May 06, 2010 - 07:20 am:   

Dear friend:
I look for the specification about "Multipart Entry Header types ", can you tell me?
Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 2105
Registered: 08-2008
Posted on Wednesday, May 12, 2010 - 07:21 pm:   

If you are looking for information on multipart encoding as used in MMS, this is defined in the WAP Wireless Session Protocol specification, which can be downloaded at

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