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Where Wizards Stay Up Late

June 26, 2009 by Roy Johnson

computer and Internet pioneers – a historical account

Do you know who invented the Internet? No, it wasn’t Al Gore – even though he once foolishly claimed he did. And in fact, it wasn’t just one person. What this fascinating documentary study reveals is the teamwork, the complementary technologies, and even the engineering competition which led to its development. It also dispels the notion that the innovation was fuelled by cold war defence concerns about possible nuclear attack.

Where Wizards Stay Up Late The majority of early adopters were research scientists in particle physics who simply wanted access to each other’s work. At first it was just a few research departments of US universities which linked themselves. The computers were huge mainframe affairs, and the results at that time still came through on punched tape. There were no mice or monitors, no Windows, and even the tiny amounts of memory were laughably small by today’s standards.

It’s amazing to realise how recent all these developments have been. It also emphasises the fact that this major innovation was a result of simultaneous developments in a number of separate disciplines, and one which came out of the sort of team work and democratic ethos which have left their mark on the Net to this day.

Katie Hafner and Matthew Lyon’s account adopts a lively documentary approach to telling the story of how it all happened. The writing is much influenced by Tom Wolfe’s new journalism, with rapid character sketches, cliff-hanging chapter endings, use of dramatic understatement, on-the-spot point of view, and lots of well-researched technical detail. Having said that, it’s not always an easy read. The names of engineers and scientists come in thick and fast, and the chronology jumps around bewilderingly in the sixties and seventies – but what emerges is a fascinating picture of many technological developments eventually pulled together to deliver what was in fact the birth of the Internet.

There’s a wonderfully dramatic moment when all the strands are pulled together in a contract submission to run the network – the computers, the wired links, and what emerges as the heart of the Net – packet-switching technology. This was invented simultaneously by Donald Davies in the UK and Paul Baran in the US. It allows information to be broken up into small units, transmitted, then reassembled without loss at any other part of a distributed network.

Their timescale stops short in the 1970s – which means the story doesn’t include anything on the World Wide Web – and strangely enough there’s very little mention of people such as Vannevar Bush or Ted Nelson. Their focus is all on the often wacky individuals and the college-boy teams who went on to become the Founding Fathers, though I was also glad to see that they give electrical engineers their due.

Other more well-orchestrated histories of this revolutionary development may be written in the future, but this one will be difficult to beat in the short term as an account of the skills, the drama, and the sheer inventiveness of these Net pioneers. There’s a full bibliography and a good index, so it’s no surprise that this title has been chosen as a set text on one of the Open University’s most popular ever courses – ‘You, your Computer, and the Internet’.

© Roy Johnson 2003

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Katie Hafner and Matthew Lyon, Where Wizards Stay Up Late: the origins of the Internet, New York: Free Press, new edition 2003, pp.304, ISBN 0743468376


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Filed Under: Techno-history Tagged With: Computers, Cultural history, Internet history, Technology, Where Wizards Stay Up Late

XHTML 1.0

June 20, 2009 by Roy Johnson

Guidance manual for moving from HTML to XHTML

It’s the sub-title of this book which is most significant. ‘The Next Generation of HTML’ signals its overall purpose – to explain how you can make the transition from HTML to XHTML. Why is this important? Because HTML has been superseded as the language of web design by XML – and XHTML is a version of it which will help you to move from one to the other. Ian Graham starts by explaining the difference between HTML and XHTML as markup languages, then describes basic document structure. This might seem tedious at first, but these issues are becoming increasingly important.

XHTML 1.0Document definitions are crucial once the X element [extensibility] is introduced into HTML. The new markup language opens up lots of new possibilities – particularly if you want to make your Web pages available on a variety of platforms and devices. After all, you can now write a page once, then adapt it for a variety of purposes by using different style sheets.

He covers all the basics of text presentation, hypertext links, graphics, then the spacing and layout that becomes possible by using style sheets. All the techniques he discusses are illustrated by both screen shots and code – so you can easily try out your own versions of effects – from layering to the tricky issues of styles within tables. He also very usefully provides illustrations of the same page viewed in different browsers.

He deals with the more advanced issues of frames, floating elements, tables, and forms, plus the possibilities of scripting and event handlers in dynamic pages.

The last part of the book contains two comprehensive reference lists – XHTML elements and cascading style sheet specifications, plus a section which explains the important differences for those people who wish to make the transition between HTML and XHTML.

There is even a website version of the book available which he promises to keep up to date – and I particularly liked the fact that he lists the (often free) development tools you will need if you plan to go down the XHTML route.

© Roy Johnson 2003

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Ian S. Graham, XHTML 1.0 – Language and Design Sourcebook: The Next Generation HTML, London/New York John Wiley, 2000, pp.692, ISBN 0471374857


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Filed Under: HTML-XML-CSS Tagged With: Computers, Technology, Web design, XHTML, XHTML 1.0

XHTML Example by Example

July 15, 2009 by Roy Johnson

convert from HTML to XHTML in easy stages

This book demonstrates how XHTML bridges the gap between yesterday’s HTML-based Web pages and tomorrow’s more sophisticated XML-based applications. The authors (including W3C guru Dave Raggett) start with a brief account of why XHTML has come to replace HTML. They include detailed coverage of the latest style sheets plus forms and scripts to create pages with ‘smart’ capabilities. One useful feature of the book is that there’s a summary list of relevant URLs at the end of each chapter – as well as an immensely heartening selection of free and shareware development tools listed amongst the appendices.

XHTML Example by ExampleThese include Raggett’s own program ‘HTML Tidy’, which will automatically convert HTML to XHTML. All stages of coding are spelt out and explained in almost relentless detail. You will be in no doubt where you’re up to with XHTML after reading this book. It’s suitable for experienced HTML coders and new Web developers alike into the state-of-the-art XHTML world

As the title implies, the information is presented through examples. The code in question is highlighted in blue for quick comprehension. Unlike some tutorials, however, the code examples are accompanied by plenty of explanation for a well-rounded learning experience.

As the book progresses gradually into the more sophisticated elements of XHTML, it explains the differences between HTML and XHTML and defines key terminology.

You’ll get a feel for rich media formats like MPEG-4, SMIL and SVG, plus some pointers to valuable tools for authoring this advanced content.

An appendix includes detailed information on XHTML development tools such as tag editors, validators and converters to get your code from HTML to XHTML.

XHTML has the accessibility of HTML and the power of XML. This title provides an example-based introduction to the XHTML language. It contains practical techniques and tips for the developer to get started.

© Roy Johnson 2002

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Aaron E. Walsh and Dave Raggett, XHTML Example by Example, Upper Saddle River NJ: Prentice Hall, 2002, pp.745, ISBN: 013040005X


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Filed Under: HTML-XML-CSS Tagged With: Computers, Technology, Web design, XHTML, XHTML Example by Example

XML Hacks

June 18, 2009 by Roy Johnson

one hundred industrial-strength tips and tools

XML is everywhere today – from web pages to mobile phone messages and automatic feeds from blog sites. On the surface it’s simplicity itself: just put everything between tags. But as Michael Fitzgerald admits here in this excellent new guide XML Hacks, once you get below that surface it’s complex stuff. Fortunately, his approach simplifies matters by splitting up his explanations of how to get the best from XML into easily digestible chunks.

XML Hacks Each explication or hack covers a single topic, and each one is followed by suggestions for further reading, free downloadable resources, and web links to either specifications or other tutorials on the topic. And all the working examples he discusses can be downloaded free from the book’s own web site – which is a very good idea.

He starts off by explaining the basic structure of an XML document and how its content can be displayed in a browser using style sheets. There’s also a brief discussion of the free tools available for XML editing, and where to find validators to check your results. I liked the fact that the outcome for each new line of coding is shown in a screenshot, so you can see what you are doing at each stage.

It’s assumed that you may wish to convert existing data into XML format, so there’s plenty of advice on using a whole range of conversion tools, and even the latest version of Microsoft Word.

Every now and then you’ve got to be prepared for some of the abstract language in which these explanations are often expressed

XML has a concept of a document entity, which is a starting point for an XML processor. A document entity, from one standpoint, may exist in a file with an associated name. However, from the standpoint of the XML spec, a document entity does not have a name and might be an input stream that has no means of identification at all.

Fortunately, each separate topic is given a difficult rating – beginners, intermediate, or expert – so you can pick your way through at whatever level suits you best.

He includes discussion of new features in the XML spec which were still being ratified by the W3C consortium whilst the book was being written. You couldn’t get much more up to date than this.

As the book progresses he gets into the more advanced features of XPointer and XSLT (Extensible Stylesheet Language). These made my brain hurt, but are obviously useful for transforming documents from one form into another.

The examples range from generating PDFs and spreadsheets from XML documents, to grabbing data out of your iTunes Library files, and even generating scalable vector graphics (SVGs).

After XML Schemas, Relax NG, DTDs, Trang.jar, and XForms, it was something of a relief to reach a practical application I could understand – syndicating the content of blogs and web sites using RSS (really Simple Syndication). This describes the available software for receiving news feeds and for creating documents which can be sent for syndication. There’s also a nifty freeware program for adding other people’s syndicated news to your own site.

He ends with some advanced hacks featuring programs such as Cocoon, Ant, Wikis, SAX, and Genx. The mind boggles. Well, mine does anyway.

As you can probably tell, there is something here for everybody – from beginners (where I felt reasonably comfortable) to intermediate (something of an aspiration) and advanced (which I imagine will remain terra incognita to me for some time to come).

© Roy Johnson 2004

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Michael Fitzgerald, XML Hacks, Sebastopol, CA: O’Reilly, 2004, pp.460, ISBN: 0596007116


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Filed Under: HTML-XML-CSS Tagged With: Computers, Technology, Web design, XML, XML Hacks

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