Microsoft Dynamics CRM includes many different software development tools that professional developers can use to create complex system customizations. The Microsoft Dynamics CRM SDK is the primary development documentation for developers, as the SDK includes architecture information, helper classes, and definitions of supported customizations. When developing Microsoft Dynamics CRM customizations, you should not access the SQL Server database directly. Instead you should connect to system data through the CrmService Web service or the MetadataService Web service. The CrmService provides basic create, read, update, and delete functionality, and the MetadataService provides a programmatic interface to the data schema. You can implement your own business logic in Microsoft Dynamics CRM using a combination of techniques, such as form scripting, server-side assemblies, workflow assemblies, and custom Web pages. Because of the flexibility of the Microsoft Dynamics CRM programming platform, the software offers an ideal development platform for tracking nontraditional CRM data beyond sales, marketing, and customer service.