SGML HTML XML What's the Difference? (Part 1) - Computerphile

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Why all the confusion, surely SGML, HTML & XML are just different versions of the same thing? Professor Brailsford on the perils of '*ML'

This video was filmed and edited by Sean Riley.

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Computerphile I hope you are aware you are creating a highly important archive of computer science knowledge from someone who 'was there' - You are doing what the BBC and other broadcasting networks which cover science are failing to do. Thank you so much.

nicholasfazzolari
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Never actually heard of SGML before this video.

LFSDK
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Damn I love listening to the man talk.

franklincerpico
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This guy is the spitting image of my late grandfather, and he talks about cool computer stuff, it's like a dream come true!

Teth
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Damn you cliffhanger! I could've sat for hours and hours listening to Brailsford, his passion and quiet enthusiasm get me hooked.

reubensmart
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My favorite computerphile speaker!! You can hear the passion and excitment in his voice, which makes it so fun to listen to! I truly appreciate all your work, the whole team. I'm doing my Phd in philosophy with computer science as an AOC, and this channel has helped me soooo much!!

syed
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Each video with Professor Brailsford is such a pleasure to watch! Thank you very much.

leobogouslavski
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Love this guys voice, I want him to read me bed time stories

essentialdang
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<body>You shall not omit the end of the video!

DieNetzente
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Sgml was a precursor to html. Used primarily to structure document formats so they could be machine independent. In 1992 I wrote my masters thesis in SGML. And many defence contracts require technical documentation in SGML so that they can be consistently read on any computer. I ran a chunk of these contracts up to 2010.

Brandlin
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More than anything right now, I'd really love to see a Computerphile video on the power of Regular Expressions. Prof Brailsford would be great at explaining this to people who don't know about it.

kranklgs
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Man, I think this man deserves his own Youtube Chanel!
Something like 'Storys from the past of computer technology'

It's always nice to listen to him, would love to have more content with him...

Stefan_Payne
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Came here to find out more about SGML in a video, thanks very much for presenting the information in a very understandable way :).

Valdaur
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computer scientists will mourn the day this man passes on to the far interweb
such an amount of knowledge of science and history of computers

dalitas
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The professor has such a soothing voice, I really enjoy the videos with him.

IqmasterDaNinja
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I love these explanations from Professor Brailsford, he has such a soothing tone in his voice! ;-)

Anyhow, since you're digging into computer history, I'd really like to know where the usage of pointy brackets for doing something came from, back in the days of the FIDO net (the FIDO net may in itself be worth a whole computerphile video!). They were later, in the late 90s on the www replaced by stars. So when I got "online-socialized", you'd write something like <ROTFLOL> or <duck&run>, while later on people wrote (asterisk)ROTFLOL(asterisk) and (asterisk)duck&run(asterisk), sometimes leaving out the end asterisk, and nowadays things like <lol> are just written without any indicating characters for the special type of "chain of letters" that is not to be read as a normal word, but as something the writer is doing, or an acronym of that. How did this change come to pass, and how was it "invented" in the first place? It goes along with the first smileys ": - )" (w/o the spaces), but somehow I have never found a good explanation of how it all came to be that way, and the changes that were made to this "informal notation" over time. I'd really like to hear someone (preferrably Prof. Brailsford, if he knows anything about it) talk about this - maybe in conjuncture with the times of mailboxes and the FIDO net and so on....this is an important part of computer history, *especially* ("old style" asterisk usage - notation for bold text here - fortunately adopted by the youtube/G+ comment system) since it was a decentralized way of spreading information digitally, which is something we almost don't have any more today, because everyone uses a platform or at least a web host company for their data to be spread...

Seegalgalguntijak
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What an awesome type of person he is!! I'd never mind going to college if he was my professor!!

RexGalilae
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<comment>Im a big fan of computerphile. I'd like to make a suggestion for a future episode on the topic of procedural generation, specifically in video games. I really like how you guys get experts, to speak about subjects that they are expert about. I think this topic would greatly benefit from this. Theres a million videos on this topic, but most of them are just made by gamers, not by computer scientists that can talk about the theory. Keep up the good work computerphile! </comment>

elritch
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It's so obvious that learning becomes profoundly easier when the first generation of knowledge holders educate on a topic. As the generation of knowledge holders withers down through time, a lot of important details are lost in teaching, thereby creating a set of less informed students and practitioners.

vickdeem
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Even though I am going to live in a way more technological suffocated world them him, I am so jealous that he was one of the many men who essentially help created the amazing world of computers we have today

KnownNever