Re: [Opensync-devel] Discussion: syncml plugin with synthesis

[deloptes <del...@ya...>]

Chris Frey wrote:

> On Fri, Oct 28, 2011 at 04:27:02PM +0200, Patrick Ohly wrote:
>> This advantage also has a significant downside: the rest of OpenSync has
>> no idea about the DevInf of the SyncML peer and thus cannot take that
>> into account when reading or writing the local database. It is also not
>> possible to provide the capabilities of the local side to the Synthesis
>> engine because there is not one single peer locally (group concept of
>> OpenSync).
>> 
>> As a result, data will get lost when doing round-trip syncs.
> 
> I'm not a SyncML expert, so I'm not familiar what this "DevInf"
> information will be, nor why we would lose it, nor why it might be
> important. :-(
> 
> Can you give me an example of what might be missing?
> 

I can't give an example but the DevInf seems to be important for the sync
process. I am not sure if we can sync forward to a local DB, than use
opensync to sync with the peers and then sync back 

Here is some introduction to DevInf

This document defines the Document Type Definition (DTD) for the XML
representation of the Device Information document. This XML document
describes the capabilities of the device and is used in SyncML data
synchronization protocol operations.
Data synchronization provides the means for two different networked object
stores to remain in identical states. Different forms of data
synchronization can be categorized into one of a number of topologies,
based on the architecture used by a data synchronization server, or sync
engine. Sync engines need to understand the features of a device they
synchronize with. This information is often stored in a Device Information
document on the target device.
[syncml_devinf_v11_20020215.pdf, p.1] *

there are too many docs there :-) but I don't find a single one about SyncML
v1.2
(http://www.openmobilealliance.org/tech/affiliates/syncml/syncmlindex.html)

regards

*) full download link
http://www.openmobilealliance.org/tech/affiliates/LicenseAgreement.asp?DocName=/syncml/syncml_devinf_v11_20020215.pdf