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Historically, InCommon assigned an URN to all new IdPs, based on the IdP's primary DNS domain name:

Code Block
languagexml
titleA legacy IdP entityID in InCommon metadata
<EntityDescriptor entityID="urn:mace:incommon:example.edu">

However, InCommon no longer issues URNs to IdPs and instead strongly encourages the use of URLs instead. Type the following command commands to produce a list of legacy URNs lists of URN-based entityIDs in InCommon metadata:

Code Block
languagebash
titleURN-based entityIDs in InCommon metadata
# listfetch theInCommon URNs in metadata
$ curl --silent MD_LOCATION=http://md.incommon.org/InCommon/InCommon-metadata.xml
$ MD_PATH=/tmp/md/InCommon-metadata.xml
$ curl --silent --dump-header /dev/tty $MD_LOCATION > $MD_PATH
HTTP/1.1 200 OK
Date: Fri, 12 Feb 2016 12:34:30 GMT
Server: Apache
Last-Modified: Thu, 11 Feb 2016 20:27:42 GMT
ETag: "110328-10843d5-52b8461eaab80"
Accept-Ranges: bytes
Content-Length: 17318869
Connection: close
Content-Type: application/samlmetadata+xml
 
# count the legacy URN-based entityIDs issued to InCommon IdPs
$ cat $MD_PATH \
  | grep -FE ' entityID="urn:mace:incommon:[^:"]+"' \
  | sed -e 's/^.* entityID="\(urn:mace:incommon:[^:"]*\)".*$/\1/' \
  | wc -l 
      75
 
# count all the URN-based entityIDs in InCommon metadata
$ cat $MD_PATH \
  | grep -F ' entityID="urn:' \
  | sed -e 's/^.* entityID="\([^"]*\)".*$/\1/' \
  | wc -l 
      76

Simply omit the last command in the pipe (wc) to produce the actual list, or better yet, view a pre-computed list of URN-based entityIDs in InCommon metadata.