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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Why is the file suffix of XML Schemas .xsd and not.xsd.xml
 On 03/10/2019 12:07, Costello, Roger L. wrote: Because file extensions are not, by convention, structured.Hi Folks, An XML Schema document is an XML document, so why isn't the file suffix of XML Schema documents .xsd.xml? Back in the mists of time, files weren't typed at all. They had names and contents, and you just had to know what type of contents were in which file. Since you had probably created all the files on the system and might well be able to remember what they were, this wasn't a problem. Then CP/M came along with its 8.3 naming rule for files. This was revolutionary (or annoying, depending on your point of view). It wasn't the only system that arose -- Acorn's RISC OS for example has an entirely separate field in the file's meta information for type -- but it became the dominant one because MS-DOS was based on CP/M and took over the market. The big advantage of file types, however implemented, is that you can associate actions with them. On a command line, this is not much use, but on a desktop it's gold. You can arrange for double-clicking a text file to start a text editor and load the file, or double-clicking an Excel spreadsheet file to do the same using Excel. As a desktop manager, you want to do this as quickly and simply as you can, so mostly by accident we have ended up with the convention that the file extension is just the text from the *last* dot onwards. Your whatever.xsd.xml.txt file would be interpreted as a text file, started up in a plain text editor, and so on. That's probably not what you want. If you want to persuade the world that everything from the first dot onwards should be the file extension, you are facing an uphill battle. Many existing file and directory names already contain dots, such as Linux libraries (version numbers) and Java modules (specialist structured names). You might persuade the XML world, but that might actually work against XML usage in general! -- Rhodri James *-* Kynesim Ltd 
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