[Docs] Further improvements

Closes #614 (closed), #617 (closed), #625 (closed)

docs/admin/01_core_concepts.rst

@@ -4,7 +4,7 @@ Concepts of the AlekSIS core
 The AlekSIS core provides functionality and data models as a base for
 all apps.
 
-.. _sec:SchoolTerms:
+.. _core-concept-schoolterm:
 
 The concept of school terms
 ---------------------------
@@ -32,7 +32,7 @@ of all school terms and buttons to create, edit or delete school terms.
 Please be aware that there can be only one school term at time and each
 school term needs a unique name.
 
-.. _sec:Persons:
+.. _core-concept-person:
 
 The concept of persons
 ----------------------
@@ -49,7 +49,7 @@ information like the following:
 -  Address details
 -  Photo
 -  Relation to guardians
--  Primary group (e. g. a class or a tutor group, cf. [@sec:Groups])
+-  Primary group (e. g. a class or a tutor group, cf. :ref:`core-concept-group`)
 
 Except for the name, all data points are optional, so you can decide on
 your own (and based on your local data protection laws) which data should be
@@ -74,7 +74,7 @@ The main method to manage persons is the view under
 ``People → Persons``. To add person to groups, you have to open the
 respective group and set the person as a member or an owner.
 
-.. _sec:Groups:
+.. _core-concept-group:
 
 The concept of groups
 ---------------------
@@ -95,18 +95,20 @@ class or a course varies from school term to school term. In order to
 archive historical data according to local laws, these groups have to be
 separeted which is solved by linking them to a school term.
 
-Manage group types
-~~~~~~~~~~~~~~~~~~
-
-You can manage your local group types by opening the menu entry
-``People → Group types`` as an admin user.
-
 Manage groups
 ~~~~~~~~~~~~~
 
 Groups are managed on the page ``People → Groups``. There you can
 search, view, create, change and delete groups.
 
+.. _core-concept-grouptype:
+
+Manage group types
+~~~~~~~~~~~~~~~~~~
+
+You can manage your local group types by opening the menu entry
+``People → Group types`` as an admin user.
+
 Import school terms, persons and groups from other data sources
 ---------------------------------------------------------------