Add schema validator, make schemas root relative.
diff --git a/specification/json/sections/cper-pci-bus.json b/specification/json/sections/cper-pci-bus.json
index 2666610..0e9c121 100644
--- a/specification/json/sections/cper-pci-bus.json
+++ b/specification/json/sections/cper-pci-bus.json
@@ -40,11 +40,11 @@
         },
         "errorStatus": {
             "type": "object",
-            "$ref": "../common/cper-json-error-status.json"
+            "$ref": "./common/cper-json-error-status.json"
         },
         "errorType": {
             "type": "object",
-            "$ref": "../common/cper-json-nvp.json"
+            "$ref": "./common/cper-json-nvp.json"
         },
         "busID": {
             "type": "object",