Editing Object identifier (section)

==Usage==
* [[ISO/IEC 6523]] "International Code Designator" uses OIDs with the prefix "1.3".
* In [[computer security]], OIDs serve to name almost every object type in [[X.509]] [[Public key certificate|certificates]], such as components of [[Distinguished Name]]s, [[Certification Practice Statement|CPS]]s, etc.
* Within [[X.500]] and [[LDAP]] schemas and protocols, OIDs uniquely name each attribute type and object class, and other elements of schema.
* In [[Simple Network Management Protocol]] (SNMP), each node in a [[management information base]] (MIB) is identified by an OID.
* IANA assigns [[Private Enterprise Number]]s (PEN) to companies and other organizations under the 1.3.6.1.4.1 node. OIDs down-tree from these are among the most commonly seen; for example, within SNMP MIBs, as LDAP attributes, and as vendor suboptions in the [[Dynamic Host Configuration Protocol]] (DHCP).
* In the [[United States]], [[Health Level Seven]] (HL7), a standards-developing organization in the area of electronic health care data exchange, is the assigning authority at the 2.16.840.1.113883 (joint-iso-itu-t.country.us.organization.hl7) node.  HL7 maintains its own [http://www.hl7.org/oid/index.cfm OID registry], and as of December 1, 2020 it contained almost 20,000 nodes, most of them under the HL7 root.  
* [[DICOM]] uses OIDs.
* The [[Centers for Disease Control and Prevention]] uses OIDs to manage the many complex values sets or "vocabularies" used in the Public Health Information Network (PHIN) Vocabulary Access and Distribution System ([https://www.cdc.gov/phin/tools/PHINvads/index.html VADS]).