RDF.Serialization.format_by_extension

You're seeing just the function format_by_extension, go back to RDF.Serialization module for more information.
Link to this function

format_by_extension(extension)

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Specs

format_by_extension(String.t()) :: format() | nil

Returns the proper RDF.Serialization.Format for the given file extension, if available.

Examples

iex> RDF.Serialization.format_by_extension("ttl")
RDF.Turtle
iex> RDF.Serialization.format_by_extension(".ttl")
RDF.Turtle
iex> RDF.Serialization.format_by_extension("jsonld")
nil  # unless json_ld is defined as a dependency of the application