-export const RESOURCE_UUID_REGEX = new RegExp(RESOURCE_UUID_PATTERN);
-export const COLLECTION_PDH_REGEX = /[a-f0-9]{32}\+\d+/;
+export const PORTABLE_DATA_HASH_PATTERN = '[a-f0-9]{32}\\+\\d+';
+export const RESOURCE_UUID_REGEX = new RegExp("^" + RESOURCE_UUID_PATTERN + "$");
+export const COLLECTION_PDH_REGEX = new RegExp("^" + PORTABLE_DATA_HASH_PATTERN + "$");
+export const KEEP_URL_REGEX = new RegExp("^(keep:)?" + PORTABLE_DATA_HASH_PATTERN);