Update README.md

README.md

 # Preface:
 - All groups of users are modelled with Teams
 - All models have non-semantic 'created' and 'updated' dates
-- All dates are ISO-8601 strings, as JATS allows for this.
+- All dates are ISO-8601 strings, as PostgreSQL recommends this as date input and JATS allows it.
 
-# Removed:
-## Journal.owners
-The owners relationship is non-core/non-semantic and can be modelled with Teams if needed. As such, it will be deprecated/removed.
-
-## Article.originalSubmissionDate
-Original submission date is the first versions's submission date, and isn't needed on the container model.
-
-## ArticleVersion.meta.contributors.middleName
-JATS recommends using <given-names> elements instead
 
 # Models
 
 ##  Journal (Collection)
 
+```
 id: ID!
 journalTitle: String! // JATS uses <journal-title> element
 articles: [ID] // ??
@@ -24,15 +16,19 @@ meta: JournalMetadata {
   publisherName: String // JATS uses <publisher-name> element
   issn: String // JATS uses <issn> element
 }
+```
 
 ##  Article (Fragment)
 
+```
 id: ID!
 journalId: ID! // Link to Journal
 versions: [ID!] // Link to Versions
+```
 
 ## ArticleVersion
 
+```
 id: ID!
 submissionDate: String // date
 status: String
@@ -52,26 +48,32 @@ meta: ArticleMetadata {
   authorNote: String
   publicationDate: String // date
 }
+```
 
 // Decision
 
+```
 status: String // e.g. 'accept'
 submissionDate: String // date
 content: String
 files: [String]
 userId: Id // Link to the editor's user
+```
 
 // Reviewer
 
+```
 invitationDate: String // date
 review: ID // Link to Review
 accepted: Boolean
 responseDate: String // date
 userId: ID
 reminders: [String] // dates
+```
 
 // Review
 
+```
 id: ID!
 versionId: ID! // Link to Version
 reviewerId: ID! // Link to Reviewer
@@ -85,6 +87,19 @@ recommendation: Recommendation {
   }
 }
 submissionDate: String // date
+```
+
+# Removed
+
+## Journal.owners
+The owners relationship is non-core/non-semantic and can be modelled with Teams if needed. As such, it will be deprecated/removed.
+
+## Article.originalSubmissionDate
+Original submission date is the first versions's submission date, and isn't needed on the container model.
+
+## ArticleVersion.meta.contributors.middleName
+JATS recommends using <given-names> elements instead
+