When attempting to upload the file at https://www.w3.org/Icons/SW/sw-horz-v.svg it is rejected with the following error
This SVG file contains an illegal namespace "http://www.w3.org/2000/01/rdf-schema#".
Source code:
<?xml version='1.0' encoding='iso-8859-1'?> <svg xmlns='http://www.w3.org/2000/svg' xml:space='preserve' version="1.2" baseProfile="tiny" overflow='visible' xmlns:xlink='http://www.w3.org/1999/xlink' viewBox='0 0 353.388 108.396' xmlns:dc='http://purl.org/dc/elements/1.1/'> <title property="dc:title">Semantic Web cube symbol with text</title> <desc property="dc:description">..</desc> <metadata> <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:rdfs='http://www.w3.org/2000/01/rdf-schema#' xmlns:cc='http://creativecommons.org/ns#'
Looks like it shouldn't be looking at this attribute for anything.