D-Net

	private static final Set<String> invalidPidTypes =

			Sets.newHashSet("distributionlocation", "url", " ", "local accession id", "local", "local id", "a local accession number", "landingpage", "publisherid", "report number", "uri", "contract", "doc",

					"issn", "issn (online)", "issn (print)", "eissn", "citation", "unknown", "other", "oai", "case number", "section", "series", "report",

					"other numbers", "site id", "fulltext", "internal", "report numbers", "product number", "depositor id", "isbn13", "doe contract number", "revision",

					"issue", "pages", "volume", "another identifier for this resource", "csvdownload", "hepdatarecord", "hepdatarecordalt", "rootdownload", "yamldownload", "yodadownload",

					"md5", "firstid", "uuid", "poster number", "compactidentifiers", "sample_id", "source identifier", "lod-catalog", "internal id", "funder", "department",

					"odin doi viewer", "odin matdb viewer", "bitstream", "dipartimento", "technical note (national research council of canada. division of building research) series",

					"internal report (national research council canada. division of building research) series", "dk.dda.ddieditor.version", "extended kim id", "kim id", "ccin",

					"dk.dda.study.annonymizeddata", "e-issn", "call number", "sequenza");