Figure1.1: RWML tree structure
This document defines a language for road information referred to as RWML (Road Web Markup Language) and describes its usage. This document is a draft and it is published to request comments from interested parties in general. It is subject to changes and it is not recommended to make a fixed software that cannot be modified and to make other standards based on this specification.
This specification was originally proposed by Hokkaido Development Bureau, Civil Engineering Research Institute. The working group is a joint research institute and consists of representatives from a number of enterprises and organizations. The working group was organized to define Road Web Markup Language, RWML for describing road information by using XML. This specification is the result of the discussion in the working group since June 1998.
Each member in the working group submitted a proposal for the responsible part in this specification. Those proposals were assembled and have been discussed. But please note that all issues have not discussed thoroughly nor all items has yet agreed unanimously as of October 20, 1999.
The version of this specification is 0.71 as of December 22, 1999.
Shortening tag names, and checking if they are appropriate as English expressions, will be done in near future.
If any technology and any specification that may affect this specification come out as a result of other standardization work regarding road information description, we will consider making the adjustments in this specification. And we are also willing to suggest standardization of this specification as open technology.
| Members of RWML working group | |||||
| Representative | Yasuhiko Kajiya | (Hokkaido Development Bureau, Civil Engineering Research Institute) | |||
| Chairman | Yukio Tezuka | (Omron Corporation) | |||
| Other members | Yoshio Nakao | (Omron Corporation) | |||
| Toshihiro Oshima | (Nagoya Electric Works Co., Ltd.) | ||||
| Katsuyuki Takitani | (Japan Weather Association) | ||||
| Junichi Saito | (Nippon Koei Co., Ltd.) | ||||
| Satoshi Hisanaga | (Mitsubishi Electric Corporation) | ||||
| Adviser | Yasuhiro Okui | (NIHON UNITEC CO., LTD.) | |||
Only one person from each company or organization is listed above although many other committee members and supporters contributed to this specification.
The adviser gave a lot of advice in making this specification as an XML expert and wrote the DTD as a result of this work.
Copyright of this specification and the DTD are held by RWML working group of which Hokkaido Development Bureau, Civil Engineering Research Institute is the representative.
Copyright ©, RWML Working Group, 1998-99, All Right Reserved.
RWML was created as a language for describing road information on the Web and it adopts the XML technology. XML has recently drawn keen attention in electric commerce, digital broadcasting, and other fields.
XML (eXtensible Markup Language) is a meta-language which provides a generalized method to define a "data-set" so that it can be interpreted by machine(machine-readable). XML employs the method to describe the data from HTML which is a language for describing web pages and provides a generalized way to extend it. Data content is enclosed by <element-name> (start-tag) and </element-name> (end-tag) so that users can understand the semantics and usage of the data. W3C (World Wide Web Consortium) which is an international consortium for Web standards published XML 1.0 as a recommendation on February in 1998. RWML is based on XML 1.0
The emergence of XML technology enables any data to be distributed among web-site systems on the platform such as Internet/Intranet. XML has drawn attention in electric commerce and digital broadcasting field because XML is recognized as a basic technology of information distribution in a highly information-oriented and data communication-oriented society. RWML was created to distribute road information on such platform. RWML can make value-added information for users by combining road information with other information such as weather information (weather forecast etc.) and local events information.
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Figure1.1: RWML tree structure |
Road-related information defined by RWML consists of road information, weather information, disaster prevention information, and regional information. Each information includes common basic information that describes data about administrators etc.
The following standards are quoted or referred in this specification.
XML
Notation of place
Notation of time
Notation of organization
Notation of hyper-reference
Weather information