rdfcat: Not an XML Name

I want to import the uniprot dataset into Jena. Since uniprot is in rdf and not in n3 I have to convert it via rdfcat into the right format before loading it with tdbloader into my database. However, I'm getting these errors when I'm converting with rdfcat:

$ ./apache-jena-2.7.4/bin/rdfcat -out n3 -x zcatpipe | head
16:36:33 WARN  RDFDefaultErrorHandler :: file:zcatpipe(line 27878 column 198): {W108} Not an XML Name: 'http://purl.uniprot.org/SHA-384/270467CF2F1A4915613B11129BAFB5747CFA0FE4DA9B398EC35D9C5039B376EF6E07180933366A0FCB5306C809529D2B'
16:36:33 WARN  RDFDefaultErrorHandler :: file:zcatpipe(line 33157 column 196): {W108} Not an XML Name: 'http://purl.uniprot.org/SHA-384/65D63EDE7317100278EE1448ADB744A86A80751CCBC39CD0608A281BAB02CAB8F172A1BB52A364803FAE2676878488BF'
16:36:33 WARN  RDFDefaultErrorHandler :: file:zcatpipe(line 33379 column 196): {W108} Not an XML Name: 'http://purl.uniprot.org/SHA-384/95E617D67B0829DA2440DAD51501FB83E27B3177F4E0CBA9C3EE6CEC486460972D7C2A5BCEBA98A926716FAEAD78133C'
16:36:33 WARN  RDFDefaultErrorHandler :: file:zcatpipe(line 35309 column 196): {W108} Not an XML Name: 'http://purl.uniprot.org/SHA-384/E134CD65C93715F13C3A880F0B9DC1FD6E2A8D62C5D8A5AAD6B10A281C37B59C20593AD063F87A7F58C70BB54DDA9A6F'
16:36:33 WARN  RDFDefaultErrorHandler :: file:zcatpipe(line 35421 column 196): {W108} Not an XML Name: 'http://purl.uniprot.org/SHA-384/5FE424054DEC8721F7D72C959DE28400745F6EF77F1C95C3D20F2CC24647B060606DCCD2E2DA3DB7852B5CD92397E230'

Can anybody tell me why there is this error (the id seems legit to me) and if (and how) I can ignore it?

EDIT: rapper also throws an "Illegal rdf:ID value"

EDIT2: For example, a line that causes this error is the fifth line in this pastebin data (sorry, I was struggling with the markdown, it didn't want to show my RDF data)