Update README.md

README.md

@@ -9,7 +9,7 @@ The normative specification of the TAP Attribute Dictionary is an abstract data
 
 TAP uses the word "schema" as a rather broad and loose term for data models generally. However, beyond that, TAP adheres to its own rigorous definitions of three specific schema-related terms, "representation", "profile", and "protocol".
 
-**Representation**:
+**Representations**:
     Mappings of the TAP Attribute Dictionary abstract entries to a specific markup form, such as JSON, XML, LDAP, or YAML.
 
 * [TAP Attribute Dictionary: How to Create a JSON Representation](tap-core-person-schema-create-json-representation.adoc) (CS-JSON)