# Secondary Structure: Lines of Business

Expere Knowledge Base content is organized by Lines of Business (LOBs). Each LOB is licensed independently; consequently, Wolters Kluwer Financial Services has organized the repository folder structure to contain a folder for each LOB. When WoltersKluwerFinancialServices.Root is expanded, the installed LOBs are displayed in the Admin Tool with the symbol.

The folder structure also contains “Common” and shared files that are used across LOBs.

## Core Folders

The document engine uses the core folder to render documents. It contains stylesheets and other files shared by all precendence units. You cannot override the core folder at custom precedence units as you can with regular .REQ content. Instead, add custom stylesheets to the core folder.

For the purpose of creating test PDFs within the Requirements and Content Editor, all core files from each precedence unit is loaded to the web authoring service. This includes js and maifest files, as well as .gif and binary files.

Parent topic: Expere Knowledge Base Repository