原文：http://www.cnblogs.com/qiangsheng/archive/2008/03/13/1103294.html
Data base document that represents a business transaction in the sales department. The following sales document types exist: inquiry, quotation, sales order, outline agreement (contracts and scheduling agreements), and complaints (returns, credit memo request, debit memo request). Further processing in sales and distribution, such as creating shipping and billing documents, is carried out on the basis of the sales documents. A sales document consists of header data which is valid for the whole document and of any number of items which contains information about goods or services which the customer wants to purchase.
－－－－－－－－－－－－－－－－－－－－－－分隔线上面是 SAP 标准文档中提供的说明
分隔线下面是我的翻译
－－－－－－－－－－－－－－－－－－－－－－
表现一笔销售部门中商业交易的数据库文档。包括下列销售凭证类型：询价单、报价单、销售订单、大纲协议（合同和计划协议）以及催询（回执、信用通知请求、借项通知请求）。销售中的更多处理，例如创建交付和帐单凭证，则由销售凭证的基础来执行。销售凭证包含对整个凭证有效的表头数据和任意数量的包含了客户想要采购的货物或服务信息的项目。