diff --git a/docs/x509.rst b/docs/x509.rst
index feca564..26dd2a0 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -215,76 +215,88 @@
 Object Identifiers
 ~~~~~~~~~~~~~~~~~~
 
-X.509 name elements are identified by :class:`ObjectIdentifier` instances. The
-following common OIDs are available as constants.
+X.509 elements are frequently identified by :class:`ObjectIdentifier`
+instances. The following common OIDs are available as constants.
 
 .. data:: OID_COMMON_NAME
 
     Corresponds to the dotted string ``"2.5.4.3"``. Historically the domain
     name would be encoded here for server certificates. :rfc:`2818` deprecates
     this practice and names of that type should now be located in a
-    SubjectAlternativeName extension.
+    SubjectAlternativeName extension. This OID is typically seen in X.509 names.
 
 .. data:: OID_COUNTRY_NAME
 
-    Corresponds to the dotted string ``"2.5.4.6"``.
+    Corresponds to the dotted string ``"2.5.4.6"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_LOCALITY_NAME
 
-    Corresponds to the dotted string ``"2.5.4.7"``.
+    Corresponds to the dotted string ``"2.5.4.7"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_STATE_OR_PROVINCE_NAME
 
-    Corresponds to the dotted string ``"2.5.4.8"``.
+    Corresponds to the dotted string ``"2.5.4.8"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_ORGANIZATION_NAME
 
-    Corresponds to the dotted string ``"2.5.4.10"``.
+    Corresponds to the dotted string ``"2.5.4.10"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_ORGANIZATIONAL_UNIT_NAME
 
-    Corresponds to the dotted string ``"2.5.4.11"``.
+    Corresponds to the dotted string ``"2.5.4.11"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_SERIAL_NUMBER
 
     Corresponds to the dotted string ``"2.5.4.5"``. This is distinct from the
     serial number of the certificate itself (which can be obtained with
-    :func:`Certificate.serial`).
+    :func:`Certificate.serial`). This OID is typically seen in X.509 names.
 
 .. data:: OID_SURNAME
 
-    Corresponds to the dotted string ``"2.5.4.4"``.
+    Corresponds to the dotted string ``"2.5.4.4"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_GIVEN_NAME
 
-    Corresponds to the dotted string ``"2.5.4.42"``.
+    Corresponds to the dotted string ``"2.5.4.42"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_TITLE
 
-    Corresponds to the dotted string ``"2.5.4.12"``.
+    Corresponds to the dotted string ``"2.5.4.12"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_GENERATION_QUALIFIER
 
-    Corresponds to the dotted string ``"2.5.4.44"``.
+    Corresponds to the dotted string ``"2.5.4.44"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_DN_QUALIFIER
 
     Corresponds to the dotted string ``"2.5.4.46"``. This specifies
     disambiguating information to add to the relative distinguished name of an
-    entry. See :rfc:`2256`.
+    entry. See :rfc:`2256`. This OID is typically seen in X.509 names.
 
 .. data:: OID_PSEUDONYM
 
-    Corresponds to the dotted string ``"2.5.4.65"``.
+    Corresponds to the dotted string ``"2.5.4.65"``. This OID is typically seen
+    in X.509 names.
 
 .. data:: OID_DOMAIN_COMPONENT
 
     Corresponds to the dotted string ``"0.9.2342.19200300.100.1.25"``. A string
-    holding one component of a domain name. See :rfc:`4519`.
+    holding one component of a domain name. See :rfc:`4519`. This OID is
+    typically seen in X.509 names.
 
 .. data:: OID_EMAIL_ADDRESS
 
-    Corresponds to the dotted string ``"1.2.840.113549.1.9.1"``.
+    Corresponds to the dotted string ``"1.2.840.113549.1.9.1"``. This OID is
+    typically seen in X.509 names.
 
 Exceptions
 ~~~~~~~~~~