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首页> 外文期刊>International journal of web services research >XML Compression for Web Services on Resource-Constrained Devices
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XML Compression for Web Services on Resource-Constrained Devices

机译：资源受限设备上的Web服务XML压缩

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摘要

Compared to other middleware approaches like CORBA or Java RMI the protocol overhead of SOAP is very high. This fact is not only disadvantageous for several performance-critical applications, but especially in environments with limited network bandwidth or resource-constrained computing devices. Although recent research work concentrated on more compact, binary representations of XML data only very few approaches account for the special characteristics of SOAP communication. In this article we will discuss the most relevant state-of-the-art technologies for compressing XML data. Furthermore, we will present a novel solution for compacting SOAP messages. In order to achieve significantly better compression rates than current approaches, our compressor utilizes structure information from an XML Schema or WSDL document. With this additional knowledge on the "grammar " of the exchanged messages, our compressor generates a single custom pushdown automaton, which can be used as a highly efficient validating parser as well as a highly efficient compressor. The main idea is to tag the transitions of the automaton with short binary identifiers that are then used to encode the path trough the automaton during parsing. Our approach leads to extremely compact data representations and is also usable in environments with veiy limited CPU and memory resources.
机译：与CORBA或Java RMI等其他中间件方法相比，SOAP的协议开销非常高。这个事实不仅对几个性能关键型应用程序不利，而且在网络带宽有限或资源受限的计算设备的环境中尤其如此。尽管最近的研究集中在更紧凑的XML数据的二进制表示形式上，但是只有极少数的方法能够说明SOAP通信的特殊特性。在本文中，我们将讨论用于压缩XML数据的最相关的最新技术。此外，我们将提出一种用于压缩SOAP消息的新颖解决方案。为了获得比当前方法明显更高的压缩率，我们的压缩器利用了XML Schema或WSDL文档中的结构信息。借助对交换消息的“语法”的额外了解，我们的压缩器将生成单个自定义下推自动机，该自动机可用作高效的验证解析器以及高效的压缩器。主要思想是用简短的二进制标识符标记自动机的过渡，然后在解析过程中将其用于编码通过自动机的路径。我们的方法导致了非常紧凑的数据表示，并且还可以在CPU和内存资源非常有限的环境中使用。

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