Merge wiki-specific Markdown in main Markdown file

doc/user/project/markdown.md

@@ -28,6 +28,13 @@
 * [Line Breaks](#line-breaks)
 * [Tables](#tables)
 
+**[Wiki-Specific Markdown](#wiki-specific-markdown)**
+
+* [Wiki - Direct page link](#wiki-direct-page-link)
+* [Wiki - Direct file link](#wiki-direct-file-link)
+* [Wiki - Hierarchical link](#wiki-hierarchical-link)
+* [Wiki - Root link](#wiki-root-link)
+
 **[References](#references)**
 
 ## GitLab Flavored Markdown (GFM)
@@ -692,6 +699,81 @@ By including colons in the header row, you can align the text within that column
 | Cell 1       | Cell 2   | Cell 3        | Cell 4       | Cell 5   | Cell 6        |
 | Cell 7       | Cell 8   | Cell 9        | Cell 10      | Cell 11  | Cell 12       |
 
+
+## Wiki-specific Markdown
+
+The following examples show how links inside wikis behave.
+
+### Wiki - Direct page link
+
+A link which just includes the slug for a page will point to that page,
+_at the base level of the wiki_.
+
+This snippet would link to a `documentation` page at the root of your wiki:
+
+```markdown
+[Link to Documentation](documentation)
+```
+
+### Wiki - Direct file link
+
+Links with a file extension point to that file, _relative to the current page_.
+
+If this snippet was placed on a page at `<your_wiki>/documentation/related`,
+it would link to `<your_wiki>/documentation/file.md`:
+
+```markdown
+[Link to File](file.md)
+```
+
+### Wiki - Hierarchical link
+
+A link can be constructed relative to the current wiki page using `./<page>`,
+`../<page>`, etc.
+
+- If this snippet was placed on a page at `<your_wiki>/documentation/main`,
+  it would link to `<your_wiki>/documentation/related`:
+
+	```markdown
+	[Link to Related Page](./related)
+	```
+
+- If this snippet was placed on a page at `<your_wiki>/documentation/related/content`,
+  it would link to `<your_wiki>/documentation/main`:
+
+	```markdown
+	[Link to Related Page](../main)
+	```
+
+- If this snippet was placed on a page at `<your_wiki>/documentation/main`,
+  it would link to `<your_wiki>/documentation/related.md`:
+
+	```markdown
+	[Link to Related Page](./related.md)
+	```
+
+- If this snippet was placed on a page at `<your_wiki>/documentation/related/content`,
+  it would link to `<your_wiki>/documentation/main.md`:
+
+	```markdown
+	[Link to Related Page](../main.md)
+	```
+
+### Wiki - Root link
+
+A link starting with a `/` is relative to the wiki root.
+
+- This snippet links to `<wiki_root>/documentation`:
+
+	```markdown
+	[Link to Related Page](/documentation)
+	```
+
+- This snippet links to `<wiki_root>/miscellaneous.md`:
+
+	```markdown
+	[Link to Related Page](/miscellaneous.md)
+	```
 ## References
 
 - This document leveraged heavily from the [Markdown-Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).