gotta suppress the damn namespace warning in XML

suppressnamespacewarning.r

library(httr); library(XML)
url <- "http://data.gbif.org/ws/rest/occurrence/list?scientificname=Accipiter%20erythronemius&coordinatestatus=TRUE&maxresults=100"
tt <- content(GET(url), as="text")
out <- xmlTreeParse(tt)$doc$children$gbifResponse

d> getNodeSet(out, "//to:TaxonOccurrence") # throws errors even though the output is what I want
Namespace prefix to on TaxonOccurrence is not defined
Namespace prefix to on catalogNumber is not defined
Namespace prefix to on country is not defined

... (output abbreviated)

[[1]]
<TaxonOccurrence gbifKey="621073312" about="http://data.gbif.org/ws/rest/occurrence/get/621073312">
 <catalogNumber>42227</catalogNumber>
 <country>Argentina</country>
 <decimalLatitude>-27.352036</decimalLatitude>
 <decimalLongitude>-65.596112</decimalLongitude>
 <identifiedTo>
  <Identification>
   <taxon>
    <TaxonConcept gbifKey="57246512" about="http://data.gbif.org/ws/rest/taxon/get/57246512">
     <hasName>
      <TaxonName>
       <nameComplete>Accipiter erythronemius</nameComplete>
       <specificEpithet>erythronemius</specificEpithet>
       <scientific>true</scientific>
      </TaxonName>
     </hasName>
    </TaxonConcept>
   </taxon>
   <taxonName>Accipiter erythronemius</taxonName>
  </Identification>
 </identifiedTo>
</TaxonOccurrence>

... (output abbreviated)