XFS3.0扩展：新增Depository Device Class Interface
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"XFS3.0扩展版是XFS接口规范的修订3.0版本，旨在扩大原有规范的范围，以适应新的设备如卡压印单元，增强现有设备的功能和能力，并回应市场对更新规范的需求。这个版本的发布受到了技术进步、实施经验以及微软技术发展的影响。"
XFS（eXtended Financial Services）是一种开放标准接口，用于在金融自助服务设备（如ATM机）中连接硬件模块和软件应用。XFS3.0是这一系列标准的最新汇总，它不仅涵盖了原有的功能，还引入了新的设备支持和增强的设备功能。
在XFS3.0中，一个重要变化是对存款设备类接口的扩展。这部分详细描述了如何与存款设备进行交互，包括获取设备状态、了解设备能力，以及执行诸如存款、分发、收回等操作的命令。例如：
1. **InfoCommands**：这些命令用于获取设备的状态和能力信息。如`WFS_INF_DEP_STATUS`用于查询存款单元的状态，`WFS_INF_DEP_CAPABILITIES`则用来获取设备的能力信息。
2. **ExecuteCommands**：这是实际执行设备操作的命令。`WFS_CMD_DEP_ENTRY`用于控制存款操作，`WFS_CMD_DEP_DISPENSE`用于从设备中分发物品，`WFS_CMD_DEP_RETRACT`则是将物品收回设备，`WFS_CMD_DEP_RESET_COUNT`和`WFS_CMD_DEP_RESET`则分别用于重置计数器和设备到初始状态。
3. **Events**：事件通知系统允许软件应用程序响应设备发生的特定情况。例如，`WFS_SRVE_DEP_ENVTAKEN`事件表示存款已被取走，而`WFS_EXEE_DEP_*`事件系列可能涉及执行过程中的异常或错误。
XFS3.0的发布反映了金融自助服务领域技术的不断进步和市场对标准化接口的持续需求。通过提供更全面和强大的设备接口，XFS3.0有助于确保兼容性，促进设备制造商和软件开发商之间的协作，同时提高服务质量，降低维护成本。这一版本的更新也意味着金融机构可以更容易地集成新的硬件技术，以满足客户不断变化的需求。
Page 5
CWA 14050-8:2000
1. Introduction
1.1 Background to Release 3.0
The CEN XFS Workshop is a continuation of the Banking Solution Vendors Council workshop and maintains a
technical commitment to the Win 32 API. However, the XFS Workshop has extended the franchise of multi
vendor software by encouraging the participation of both banks and vendors to take part in the deliberations of
the creation of an industry standard. This move towards opening the participation beyond the BSVC's original
membership has been very succesful with a current membership level of more than 20 companies.
The fundamental aims of the XFS Workshop are to promote a clear and unambiguous specification for both
service providers and application developers. This has been achieved to date by sub groups working
electronically and quarterly meetings.
The move from an XFS 2.0 specification to a 3.0 specification has been prompted by a series of factors. Initially,
there has been a technical imperative to extend the scope of the existing specification of the XFS Manager to
include new devices, such as the Card Embossing Unit.
Similarly, there has also been pressure, through implementation experience and the advance of the Microsoft
technology, to extend the functionality and capabilities of the existing devices covered by the specification.
Finally, it is also clear that our customers and the market are asking for an update to a specification, which is
now over 2 years old. Increasing market acceptance and the need to meet this demand is driving the Workshop
towards this release.
The clear direction of the XFS Workshop, therefore, is the delivery of a new Release 3.0 specification based on
a C API. It will be delivered with the promise of the protection of technical investment for existing applications
and the design to safeguard future developments.
1.2 XFS Service-Specific Programming
The service classes are defined by their service-specific commands and the associated data structures, error
codes, messages, etc. These commands are used to request functions that are specific to one or more classes of
service providers, but not all of them, and therefore are not included in the common API for basic or
administration functions.
When a service-specific command is common among two or more classes of service providers, the syntax of the
command is as similar as possible across all services, since a major objective of the Extensions for Financial
Services is to standardize command codes and structures for the broadest variety of services. For example, using
the
WFSExecute
function, the commands to read data from various services are as similar as possible to each
other in their syntax and data structures.
In general, the specific command set for a service class is defined as the union of the sets of specific capabilities
likely to be provided by the developers of the services of that class; thus any particular device will normally
support only a subset of the command set defined for the class.
There are three cases in which a service provider may receive a service-specific command that it does not
support:
The requested capability is defined for the class of service providers by the XFS specification, the particular
vendor implementation of that service does not support it, and the unsupported capability is
not
considered
to be fundamental to the service. In this case, the service provider returns a successful completion, but does
no operation. An example would be a request from an application to turn on a control indicator on a
passbook printer; the service provider recognizes the command, but since the passbook printer it is
managing does not include that indicator, the service provider does no operation and returns a successful
completion to the application.
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