What are categories?
When you work with a collection which includes material belonging to different subjects, you will probably want to keep different subjects in different sections of the knowledge tree displayed in the contents window. You will probably also want to design the looks of your items differently for questions in literature, and differently for questions related to mathematics. For example, you will use pictures to illustrate your anatomy branch, sounds to illustrate your foreign language section, spell-pads to make your spelling section more effective, etc.
To help you keep different subjects in one collection, SuperMemo introduces the concept of a category. A category is a section of the knowledge tree in the contents window. It is used for keeping material related to a single subject. Elements added to a given category may use their own template that determines their look (e.g. images, sounds, colors, fonts, sizes of text fields, number of shape components, etc.). It is highly recommended that you learn about templates before using categories. See: Using templates
Creating a category
You can easily create a new category using the following steps:
Properties of a category
If you would like to edit categories, you can choose Search : Categories on the main menu. You will see the category registry with all categories that you have defined until now:
Each category in the registry is characterized by the following attributes (compare with the picture above):
Using category registry
The category registry can be opened with Search : Categories on the main menu. Category registry is useful in the following circumstances:
It is not recommended to change Root or Hook manually (unless you fully understand the way SuperMemo builds category folders under the category root)
Here is the typical way of working with categories:
Once you understand the concept of the category, it will become very easy to manage a large number of items belonging to entirely different areas of knowledge
Frequently Asked Questions
Mar 18, 1999)
When I go to the contents window, select a category branch and click Ctrl+A, the template of this category is not used! Can you help?
To use a category template, you have to first choose the category in the category combo box on the Tools toolbar. Selecting branches in the contents window does not affect the current category selection
(Luis Gustavo, Brazil, Oct 1, 2000)
If I delete a category, will all its elements be deleted?
No. The category is an abstract structure living above the level of the content tree. Once you delete it, no elements will be affected. Nor will the structure of the knowledge tree
When I use Task Extract it adds tasks to a wrong branch in the contents
Please verify the hook node of the category used by the target tasklist. This options seems to work correctly
You can use categories to influence where new elements are added with Add new (#5387)
(R.K., Sun, Jun 17, 2001 17:54)
I would expect SuperMemo to add a new item as a straight neighbor of the previously added element in the contents window. Why isn't it so?
Selection in the contents window is too transient to be the basis of choosing the insertion point for new material. This would require constant user attention as to the present selection. As a remedy, the concept of a category has been introduced. Each category, such as biology or geography, has its own insertion point called a hook. Now, all you have to do is to select a category, and Add new will add new elements to that category. Added elements will be listed sequentially as neighbors