In VCF v4.3 structured meta-information lines must have an ID subfield. Split the value into identifier-like ID and text Description subfields to demonstrate the structured benefit, though for a non-INFO/FORMAT/etc line there's probably nothing requiring ID's value to be identifier-like. Fixes #772.
This leaves the similar 4.1 and 4.2 files as is, as it is less clear whether ID-less structured headers are merely discouraged there and/or is unspecified and largely left up to implementations — cf #760.
In VCF v4.3 structured meta-information lines must have an ID subfield. Split the value into identifier-like ID and text Description subfields to demonstrate the structured benefit, though for a non-INFO/FORMAT/etc line there's probably nothing requiring ID's value to be identifier-like. Fixes #772.
This leaves the similar 4.1 and 4.2 files as is, as it is less clear whether ID-less structured headers are merely discouraged there and/or is unspecified and largely left up to implementations — cf #760.