This came to my attention recently when I found an amazing video on Youtube by:

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> [Micheal E. Anderson: Comparing Messaging Techniques for the IoT, OpenIoTSummit, Linux Foundation](https://www.youtube.com/watch?v=6DRFAOTGdjA&list=PLlx98-upIVs9RBVFkUxeeL4JkSJl8Y_lt&index=1).
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The slides for his talk are Available [Here](http://events.linuxfoundation.org/sites/events/files/slides/IoT_Messaging_Anderson.pdf)

On Slide 26 and *41 minutes* of the video he is discussing about how (let me paraphrase):

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> Cellular carriers prefer that their IoT consumers use **HTML**, **XML** or **JSON** type of messages since they consume more Data. More Data means they can charge the consumers more money for the service.
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I understand that a lot of proprietary protocols viz. **SigFox**, **Wireless HART** or **Z Wave** have lower data rates and sending *bulky* data over such carriers can be an expensive affair. 

### Question

* Are there some other *light-weight* messaging formats that are being used for usage in Proprietary Protocols which makes them cost-efficient solutions for current and future IoT consumers? (Shot in a dark: some format called *lightweight XML or HTML or JSON* is lying somewhere?)
* Maybe something like [**CBOR**](http://cbor.io/) is or maybe used ?