* In [Beacon 0.2 specifications](https://docs.google.com/document/d/154GBOixuZxpoPykGKcPOyrYUcgEXVe2NvKx61P4Ybn4/edit), 'variants' is a mandatory property of DataSizeResource and its value was arbitrary set to -1. Now, we have to decide whether we should:
1. stick to -1.
2. use the property 'variants' to count the number of segments (for instance).
2. use the property 'variants' to count the number of segments (for instance). - 9 March 2016 - APPROVED.
3. ask the Beacon team if we can make this optional property.
4. ask the Beacon team if we can change the property name.
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* In [Beacon 0.2 specifications](https://docs.google.com/document/d/154GBOixuZxpoPykGKcPOyrYUcgEXVe2NvKx61P4Ybn4/edit), 'reference' is a mandatory property of DataSetResource. The problem is that, in arrayMap, the genome version is linked to a given sample, and not to a cancer tissue type. Moreover, there can be more than one genome version in a sample. Now, we have to decide whether we should:
