Merge pull request #5690 from EnterpriseDB/style-guide-terms

Added style guide information for three new topics

advocacy_docs/community/contributing/styleguide.mdx

@@ -72,6 +72,8 @@ Included in this guide:
 * 11 [Lists](#lists)
 * 12 [Images](#images)
 * 13 [Dates](#dates)
+* 14 [Terminology considerations](#terminology-considerations)
+* 15 [Trademark symbols](#trademark-symbols)
 
 ## Language and tone
 
@@ -594,3 +596,38 @@ When specifying dates for human readability, use the DD mmm YYYY format with a s
 
 When specifying dates as solely numbers, use [ISO8601](https://www.iso.org/iso-8601-date-and-time-format.html) format; YYYY/MM/DD. This is the internationally accepted, disambiguous format and should be used where you may expect the date to be read by automated systems.
 
+## Terminology considerations 
+
+### Ambiguity of the term "cluster"
+
+The term "cluster" can refer to different groups of resources in the technological field. 
+At EDB, the product documentation uses the term "cluster" to refer to several different objects/concepts.
+To avoid ambiguity, always use an adjective (describing word) to clarify which of the cluster types you're referring to in the specific context.
+
+Here are a few examples:
+
+**Postgres cluster**: Also known as a [database cluster](/epas/latest/fundamentals/epas_fundamentals/terminology/#database-cluster), a Postgres cluster is a Postgres server that hosts a number of databases in a single file system location.
+
+**PGD cluster**: A [PGD cluster](/pgd/latest/terminology/#pgd-cluster) is a [Postgres Distributed](/pgd/latest/) system with a group of multiple redundant database systems in different locations.
+
+**Kubernetes cluster**: A [Kubernetes cluster](https://kubernetes.io/docs/reference/glossary/?fundamental=true#term-cluster) is a set of multiple nodes that run containerized applications.
+
+### Postgres distributions
+
+EDB products support three types of Postgres distributions: 
+
+- PostgreSQL (open-source or community Postgres) 
+- EDB Postgres Advanced Server (EPAS) 
+- EDB Postgres Extended Server (PGE) 
+
+Although also referred to as "Postgres flavors," the preferred terms are "Postgres" or "Postgres distributions" to refer to all three options.
+
+## Trademark symbols 
+
+Use the ™ or ® symbol at least upon the first use of the `EDB Postgres® + [product]` trademark in the body text of a page. 
+
+Examples: EDB Postgres® AI, EDB Postgres® Analytics, EDB Postgres® Machine Learning, etc. 
+
+For other trademarks, the documentation site already includes a general disclaimer at the footer of every page called "Trademark" which links to https://www.enterprisedb.com/trademarks.
+Contrary to the specifications on [Trademarks](https://www.enterprisedb.com/trademarks), don't include the symbol in page titles, 
+because the symbol can affect how search engines index and find pages.