Optional sources seems to be required

[Stephen-Gates]

sources is an optional property but it seems to be required https://github.com/frictionlessdata/specs/blob/master/schemas/dictionary/common.yml#L277

My understanding is that sources is optional but if it is present it must have a title and may have a path and /or email.

Shouldn't https://github.com/frictionlessdata/specs/blob/master/schemas/dictionary/common.yml#L290 use path instead of uri?
and
https://github.com/frictionlessdata/specs/blob/master/schemas/dictionary/common.yml#L289 use title instead of name

[rufuspollock]

@Stephen-Gates yes, sources is optional and MUST have title.

I think all your corrections are correct -- this mismatch arose from the rewrite last may where we corrected one item without the other (accidentally). Please submit a PR.