add parenting guide

content/article/int-parenting.md

@@ -0,0 +1,87 @@
+---
+title: "Parenting & Associating entries"
+date: "2023-08-15T13:52:05+03:00"
+author: "anybody"
+contributors: ["constantinos-miltiadis.md"] 
+draft: true 
+keywords:
+  - guide
+  - internal
+abstract: |
+  (Internal) Guide for parenting and associating entries.
+---
+
+# Introduction
+
+Sandpoints allows parenting and associating different content types. This is done in the YAML header of a Markdown entry. Parenting content is done by providing a list of filenames of the children of a given entry. Associating content is done by providing a list of filenames of the associated entries (for an issue or article). 
+
+As in the examples below, for either case: 
+- provide filenames including extensions within quotations,  
+- separate entries with commas, as in the examples below, and 
+- make sure to leave a whitespace character been the colon and the square brackets. 
+- Example `flag: ["something.md", "something-else.md"]` 
+
+# Parenting content 
+
+*Sandpoints* follows a triadic hierarchy, which, here is *Journal>Issue>Article*, or:     
+```
+Journal   
+ └── Issue     
+	└── Article
+```
+
+Thus, a journal has issues, and issues have articles. Following this convention, the YAML header section for each item that has children features the flag: 
+
+```
+has_<child-content-type-in-plural>: ["child-1.md", "child-2.md"]
+```
+
+The YAML section for a **journal** instance has the field: 
+```
+has_issues: []
+```
+And the YAML section of an **issue** instance has the field: 
+```
+has_articles: []
+```
+
+## Parenting issues to the journal 
+
+```
+---
+title: "Game Design Knowledge & Practice Journal"
+has_issues: ["issue-1.md", "issue-2.md"]
+---
+```
+
+## Parenting articles to issues
+```
+---
+title: "Some issue"
+has_articles: ["article-1.md", "article-2.md"]
+---
+```
+
+# Associating content 
+
+Sandpoints allows associations between: 
+- issues and editors, and 
+- articles and contributors. 
+
+This is done by providing a list of editors in the YAML section of an issue, or a list of contributors in the YAML section of an article, respectively. 
+## Associating editors to issue
+
+```
+---
+title: "Some Issue"
+editors: ["jane-editor.md", "joe-editor.md"]
+---
+```
+## Associating contributors to article
+
+```
+---
+title: "Some Article"
+contributors: ["jane-contributor.md", "joe-contributor.md"]
+---
+```