Original sentence: The value of this attribute is interpreted as a URI Reference as defined in RFC 2396 [IETF RFC 2396], after processing according to Section 3.1
Edited sentence: It serves the function described in section 5.1.1 of RFC3986, establishing the base URI (or IRI) for resolving any relative references found within the effective scope of the xml:base attribute.The value of this attribute is interpreted as a URI Reference as defined in RFC 3986 [IETF RFC 3986]