D

data sharing

Data sharing is an administrative option that permits different users accessing the same report object to use the same data when viewing a report on demand or when refreshing a report. Enabling data sharing reduces the number of database calls, thereby reducing the time needed to provide report pages to subsequent users of the same report while greatly improving overall system performance under load. However, to get full value from data sharing, you must permit data to be reused for some period of time. This means that some users may see "old" data when they view a report on demand, or refresh a report instance that they are viewing.

data source

A data source is a database, table, query, or stored procedure result set that provides the data for a report.

database

A database is a bank of related data. Each unit (record) of the database is typically organized in a fixed format to make it easier to retrieve selected portions of the data on demand. Each record is made up of one or more data fields, and each data field can hold one piece of data (known as a value).

Demilitarized Zone (DMZ)

A Demilitarized Zone (DMZ) is a tool that many companies use to improve the security of their internal networks while providing external users with access to selected data or services. A DMZ is a network area that is neither part of the internal network nor directly part of the Internet. Typically, the DMZ is set up between two firewalls: an outer firewall and an inner firewall. Users from the external network are allowed access only to data or services hosted on computers inside the DMZ. Web servers are typically placed in a DMZ.

DHTML viewer

The DHTML viewer is a zero-client viewer, which is accessed using a web browser that supports Dynamic HTML. It is one of the default Crystal Reports Viewers found in the Crystal Enterprise web desktop.

Dynamic Link Library (DLL)

A Dynamic Link Library (DLL) is a special kind of file that contains Windows functions. DLLs are used by developers to extend the capabilities of Windows applications. The library is activated whenever an application or another DLL calls a function in the library. DLLs link on the fly, at runtime, whenever an included function is called. DLL functions are available on an as-needed basis to any program that can call DLLs; they do not need to be linked to the program via the compiler. The Crystal Report Engine can be called as a DLL by developers for use with applications they are developing.