[Parameter] base [Nullable] ✘ [Optional] ✔ [Description] An optional base to be used by the parser when resolving relative IRI references. [Type] 
DOMString
R D F P a r s e r
a n y
P a r s e r C a l l b a c k
D O M S t r i n g
P r o j e c t i o n
o b j e c t