USV is led by Joel Parker Henderson ([email protected]).
Constructive feedback is welcome. See also criticisms.
- Is USV easy?
- IS USV aiming to be a standard?
- Why choose USV over CSV or TSV?
- Why choose USV over ASV?
- Why choose USV over ASV for machine-only data?
- Why use control picture characters rather than the control characters themselves?
- Why are the symbols so small on my screen?
Yes. If you know about comma separated values (CSV), or tab separated values (TSV), or ASCII separated values (ASV), or JavaScript Object Notation (JSON), then you already know much about USV.
Yes, USV is aiming to become an IETF standard similar to IETF RCF 4180 for CSV. We have submitted the IETF Internet Draft and it is a work in progress.
Yes, USV is aiming to become an IANA standard similar to IANA TSV. We have submitted the request for the "text/usv" media type.
You want your data content to be able to contain commas, or tabs, or newlines, without special escaping or different quoting rules than other data such as numbers.
You want your data content to be able to use data groups, or database tables, or spreadsheet grids.
You want your data format to be able to use data files, or database schemas, or spreadsheet folios.
You want your data semantics to be able to use hierarchy levels, nesting, or outlines.
You want a consistent compatible standard format, which CSV can't always provide.
You want a consistent compatible standardized file name extension, which CSV/TSV/TDF can't always provide.
You want to use End of Transmission (EOT), so you can guarantee a reader has read data until the end.
You want your data content to be friendlier for human reading and human editing.
USV provides typically-visible letter-width characters (such as Unicode 241F), whereas ASV provides typically-invisible zero-width characters (such as ASCII 31).
It's true that some editors do render ASV characters using other visual representations, such as using the corresponding USV visible characters; however in practice we haven't found much support for this approach.
For machine-only data, such as data that will never be used for human reading or human editing, then USV or ASV are similar because both can handle units, fields, groups, and files.
We tried using the control characters, and also tried configuring various editors to show the control characters by rendering the control picture characters.
First, we encountered many difficulties with editor configurations, attempting to make each editor treat the invisible zero-width characters by rendering with the visible letter-width characters.
Second, we encountered problems with copy/paste functionality, where it often didn't work because the editor implementations and terminal implementations copied visible letter-width characters, not the underlying invisible zero-width characters.
Third, users were unable to distinguish between the rendered control picture characters (e.g. the editor saw ASCII 31 and rendered Unicode Unit Separator) versus the control picture characters being in the data content (e.g. someone actually typed Unicode Unit Separator into the data content).
USV renders on your system by using your local font. If your local font has small Unicode symbols for specific characters, then you'll see these. On many systems we've tried, the characters render with the letters "US", "RS", "GS", "FS", etc. We are open to suggestions for fonts that work especially with with USV, and we are open to funding the creation of specialized fonts for these specific characters.