Add GBIF use case

[JeniT]

See http://lists.w3.org/Archives/Public/public-csv-wg/2014May/0016.html

[JeniT]

Include requirements that Tim talks about in http://lists.w3.org/Archives/Public/public-csv-wg/2014May/0019.html namely:

• default values when values are missing
• fixed values for fields in all rows

[timrobertson100]

The email link above does not include the attachments which can be found here:
https://dl.dropboxusercontent.com/u/608155/transient/meta.xml
https://dl.dropboxusercontent.com/u/608155/transient/dwca.zip

The meta.xml is the important piece, WRT to annotating existing content

[timrobertson100]

default values when values are missing

Useful when annotating CSV data produced outside of your control.
E.g. a database which has a NULLABLE language field, but the person annotating knows that "where not specified US English is assumed". Requires contextual knowledge of the CSV being annotated.

fixed values for fields in all rows

Similarly useful when annotating CSV outside of your control. The GBIF data publishing tool allows a user to upload a spreadsheet or connect to a database and map fields to the DarwinCore standard. During that mapping the tool allows you to declare constants applicable to every row - these constants are stored as annotations. For example declaring each record represents a dwc:basisOfRecord = PRESERVED_SPECIMEN

[iherman]

The use case is now part of the UCR document; closing the issue. See

http://w3c.github.io/csvw/use-cases-and-requirements/index.html#UC-DarwinCoreArchiveStandardGBIF