本规范描述了与XFS兼容的现金分发模块（CDM）服务提供商的功能。它定义了可以使用WFSGetInfo、WFSAsyncGetInfo、WFSExecute和WFSAsyncExecute函数向服务提供者发出的特定于服务的命令。通过断电、打开会话、关闭会话和系统重置来维护持久值。本规范涵盖物品分配。“物品”是指任何可以分发的媒介，包括优惠券、文件、票据和硬币。但是，如果硬币和纸币都要分发，则必须为每种硬币和纸币分别提供服务。本规范中的所有货币参数均表示为WFS INF U CDM U currency U EXP命令说明中定义的最小分配单位数量。

This specification describes the functionality of an XFS compliant Cash Dispenser Module (CDM) Service Provider. It defines the service-specific commands that can be issued to the Service Provider using the WFSGetInfo, WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions. Persistent values are maintained through power failures, open sessions, close session and system resets. This specification covers the dispensing of items. An “item” is defined as any media that can be dispensed and includes coupons, documents, bills and coins. However, if coins and bills are both to be dispensed separate Service Providers must be implemented for each. All currency parameters in this specification are expressed as a quantity of minimum dispense units, as defined in the description of the WFS_INF_CDM_CURRENCY_EXP command.