vault: Add 'Access links.md' for experimenting with links

Author: claremacrae

resources/sample_vaults/Tasks-Demo/How To/Access links.md

@@ -0,0 +1,73 @@
+---
+TQ_short_mode: true
+TQ_extra_instructions: |-
+  group by folder
+  group by function task.file.filenameWithoutExtension
+---
+
+# Accessing Links
+
+> [!Warning]
+>
+> - The queries in this file are **experimental**, and **may not continue to work**.
+> - For example, once the Obsidian Bases facility is finalised, we *may* update the vocabulary used here to match that of Obsidian.
+
+## Filtering
+
+### `task.outlinks`: Task lines containing an outgoing link
+
+```tasks
+# Task line has a link
+filter by function task.outlinks.length > 0
+limit groups 1
+```
+
+### `task.file.outlinksInProperties`: Tasks in files whose properties/frontmatter contains a link
+
+```tasks
+filter by function task.file.outlinksInProperties.length > 0
+limit groups 1
+```
+
+### `task.file.outlinksInBody`: Tasks in files whose markdown body contains a link
+
+```tasks
+filter by function task.file.outlinksInBody.length > 0
+limit groups 1
+```
+
+### `task.file.outlinks`: Tasks in files whose file contains a link anywhere
+
+```tasks
+filter by function task.file.outlinks.length > 0
+limit groups 1
+```
+
+## Grouping
+
+### Group by task outlinks
+
+```tasks
+# Task line has a link
+filter by function task.outlinks.length > 0
+group by function task.outlinks.map(link => link.originalMarkdown).sort().join(' · ')
+limit groups 1
+```
+
+### Group by task outlinks - task outlinks that give broken group headings
+
+- Hovering over these links **in the task lines** works because of [#3357](https://github.com/obsidian-tasks-group/obsidian-tasks/pull/3357).
+- Hovering over these links **in the group headings** gives things like **Unable to find “Basic Internal Links” in Access links**
+
+```tasks
+# Task line has a link
+filter by function task.outlinks.length > 0
+
+# Task's link goes to a heading in the same file
+description includes [[#
+
+filename includes internal_heading_links
+
+group by function task.outlinks.map(link => link.originalMarkdown).sort().join(' · ')
+limit groups 1
+```