add metadata

Project.toml

@@ -1,7 +1,7 @@
 name = "DataAPI"
 uuid = "9a962f9c-6df0-11e9-0e5d-c546b8b5ee8a"
 authors = ["quinnj <[email protected]>"]
-version = "1.10.0"
+version = "1.11.0"
 
 [compat]
 julia = "1"

src/DataAPI.jl

@@ -287,4 +287,11 @@ using a `sink` function to materialize the table.
 """
 function allcombinations end
 
+"""
+    getmetadata(x, ...)
+
+Return metadata associated with object `x` or `nothing` if it doest not support metadata.
+"""
+getmetadata(::Any) = nothing
+
 end # module