4.2 Serializing RDF Terms
Regarding the serialisation of IRIs in the TSV format, the spec only states that “IRIs [are] enclosed in <...>”. This phrasing would permit the use of relative IRIs, although that appears not to be intended.
For clarity, the section could also state that datatype IRIs on literals must be written in their full <...> form. Prefix mappings are not available in this format.
https://github.com/w3c/sparql-12/wiki/SPARQL-Errata#sparql-11-query-results-csv-and-tsv-formats
4.2 Serializing RDF Terms Regarding the serialisation of IRIs in the TSV format, the spec only states that “IRIs [are] enclosed in <...>”. This phrasing would permit the use of relative IRIs, although that appears not to be intended.
For clarity, the section could also state that datatype IRIs on literals must be written in their full <...> form. Prefix mappings are not available in this format.