diff --git a/p/C0XUTIL.m b/p/C0XUTIL.m
index 022b2ee..848ff36 100644
--- a/p/C0XUTIL.m
+++ b/p/C0XUTIL.m
@@ -46,9 +46,9 @@ VOCINIT ; INITIALIZE VOCABULARIES
  S C0XVOC("sp")="http://smartplatforms.org/terms#"
  S C0XVOC("qds")="http://cms.gov/pqri/qds/"
  S C0XVOC("smart")="http://sandbox-api.smartplatforms.org/records/"
- S C0XVOC("snomed")="http://www.ihtsdo.org/snomed-ct/concepts/"
- S C0XVOC("rxnorm")="http://rxnav.nlm.nih.gov/REST/rxcui/"
- S C0XVOC("loinc")="http://loinc.org/codes/"
+ S C0XVOC("snomed")="http://purl.bioontology.org/ontology/SNOMEDCT/"
+ S C0XVOC("rxnorm")="http://purl.bioontology.org/ontology/RXNORM/"
+ S C0XVOC("loinc")="http://purl.bioontology.org/ontology/LNC/"
  S C0XVOC("file")="/home/glilly/fmts/trunk/samples/"
  S C0XVOC("foaf")="http://xmlns.com/foaf/0.1/"
  S C0XVOC("skos")="http://www.w3.org/2004/02/skos/core#"