Status of product library components
The product library visually indicates the status of products and/or files using a series of symbols inside its window and the file manager. Typically, these symbols are displayed on top of the existing icons for the product or file.
The file, product, or template is currently checked out to you, allowing only you to perform particular actions.
The file, product, or template is currently checked out to another user, preventing you from performing particular actions (exclusive lock).
One or more files that together make a product (MXD, instance database, and so on) have different states (checked out versus checked in).
The file has one or more links to other locations in product library.
Associated file checked out
One or more files (accessed via the file manager) associated with the product library component are currently checked out.