redemption code and s3

gistfile1.txt

PREFIX pdb: <http://oreilly.com/legacy/pdb/>
PREFIX product: <urn:x-domain:oreilly.com:product:>
PREFIX dc: <http://purl.org/dc/terms/>
PREFIX pt: <http://purl.oreilly.com/product-types/>
PREFIX trons: <http://purl.oreilly.com/ns/trons/>
PREFIX status: <http://purl.oreilly.com/statuses/>
PREFIX frbr: <http://purl.org/vocab/frbr/core#>
PREFIX mods: <http://www.loc.gov/mods/>
PREFIX pubs: <http://purl.oreilly.com/publishers/>
PREFIX om: <http://purl.oreilly.com/ns/meta/>

select
?x ?s ?p ?o
where
{
    ?ip frbr:embodiment ?s .
    ?ip frbr:embodiment ?p .
    ?s dc:type pt:BOOK .
    ?p dc:type pt:EBOOK .

    OPTIONAL { ?x dc:isFormatOf ?p .}
    OPTIONAL {?s om:pdfDownloadKey ?o }

filter ( ?ip = product:9780596517748.IP )
}