Various errata from 1.1

[gkellogg]

From RDF 1.1 Errata:

• 13 – Missing references to RDF 1.0
• 29 – Terminology about IRIs
  • Also, note that RFC 3987 never made it past PROPOSED STANDARD level. This is also referenced in Kill "IRI"? json-ld-syntax#355.

[gkellogg]

@afs commented on the IRI issue in w3c/EasierRDF#75 (comment).

https://www.w3.org/International/wiki/IRIStatus raises issues about encoding of Internationalized Domain Names and presentation of Bidirectional Language.

The grammar for IRIs in RFC3987 over Unicode codepoint is solid.

RDF 1.1 uses IRIs but it doesn't define them, nor create them, encode or decode them. To some extent, it's garbage-in-garbage-out like any other data. The unicode string must conform to RFC3987 grammar and what it refers is consistent between the creator and any app receiving the data.

The %XX issues are not specific to IRIs - it applies to URIs as well. %7E for example. RFC 3986 section 2.3 says "don't do that" and add that normalization should put the real character in. There is discussion in RDF spec section 3.2.

Consider making reference informative, and duplicating the important parts in an appendix, which is probably limited to the grammar and maybe normalization.

[gkellogg]

IRI Terminology issues now in #15.