Support rdf type xsd:decimal

[zaredb]

Importing an RDF with officially supported XML data type decimal fails

RDF Compatible core types: https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-compatible-xsd-types

Supported types in dgraph loader https://github.com/dgraph-io/dgraph/blob/350209fbbe4be50416f2f361491c2cf879d7d494/rdf/parse.go#L412

[ashwin95r]

Supporting arbitrary precision decimal numbers isn't on the roadmap. You can use float (which uses 64 bits), or strings to represent this data.

[EronWright]

Support for arbitrary precision decimal numbers would be quite handy for cryptocurrency applications, which routinely model currency units (e.g. Ethereum ether, wei) as xsd:decimal / BigDecimal.

[manishrjain]

Yeah, we should consider supporting BigDecimal types.

[EronWright]

To facilitate a contribution, would someone kindly enumerate the high-level tasks? Thanks!

[manishrjain]

Closing this in favor of a newer duplicate issue.