Organizing your catalog is very easy to do, you should use the categories feature to do it. By making unique categories and placing your catalog items into them you will be creating a taxonomy. This will let you filter and sort your catalog in unique ways that wouldn't be possible without. The main reason to categorize your catalog is so you may have specific items shown on specific posts or pages.
Making a Category
In the edit catalog item form, under the categories sub-panel, enter a category name in the field to the left of the new button and then click the new button. After the new category is created and loaded it will appear in a checkbox list above, your new category should already be checked. Click the "Save" button at the bottom of the form and your catalog item is now in a category.
Edit a catalog item and check the box next to any category you want the item to be in. Next hit save.
Editing A Category
In the edit catalog item form their is a checkbox list of available categories for your catalog. If you hover your mouse over a category in the list an edit link will appear, simply click this link to make a modal popup window appear with a simple form.
In the form will be two text fields, one for the category name and the other for the category slug. The category slug is used to create the full path of the archive page's permalink, when the public feature is enabled. You should not set these to reserved WordPress words and there are certain rules for naming, such as a slug should not contain spaces.
Deleting A Category
Click the edit link on the right side of the category you wish to delete, in the edit modal popup window you will see a Delete Category link. Click this link and confirm your decision to delete the category.
Filtering Your Catalog
Once you have categorized your catalog you may filter your results for easier use. The first and most obvious use of this will be in the Admin Panels where you can use the category drop down menu to show one category at a time. But the real power is when using the shortcode in your posts or pages. It is simple to add a category filter to the shortcode, allowing you to display only items from that category. To do so simply add a shortcode option like so,
[catablog category="dog"]. If you want to show catalog items from 3 categories separate each category name with a comma,
[catablog category="dogs,cats,mice"]. You may use and combine any number of categories you see fit. One idea to utilize this feature would be to have a product type and a language category, thus allowing you to create a multilingual product catalog.
Advanced Filtering: The Operator Option
There is one other shortcode option that lets you control how your catalog is filtered, the operator option. This option utilizes the new taxonomy query parameter in WordPress 3.1. Possible values for this option are 'IN', 'NOT IN' and 'AND'. The default value for this option is 'IN', which basically means if the catalog item is in any of the categories selected for the shortcode, it will be displayed. If you change this option to 'NOT IN', then you will display all catalog items that are not in any of the selected categories. The last possible value, 'AND', will make sure that all catalog items being displayed are in all the selected categories. Here are some examples:
[catablog category="red,blue,green" operator="in"]
show catalog items that are in red, blue or green categories. it does not matter if an item is only in one of the categories, it will be shown.
[catablog category="red" operator="not in"]
show all catalog items that are not in the red category. hides all items categorized as red.
[catablog category="red,green" operator="and"]
show catalog items that are in both the red and green category, if an item is in only one of these categories it will not be displayed.