Web Technologies

1. 00:06The web today and tomorrow, let's speak about social web semantic and the service web.
2. 00:16The web was designed in nineteen ninety and the evolution of the world
3. 00:20wide web in this last twenty five years shape today's web
4. 00:24through numerous transformation. So originally
5. 00:27web was read-only web or static web. All the resources
6. 00:33were static HTML pages and by means of HTTP protocol the user
7. 00:40requested and received this document.
8. 00:44Often this phase of the world wide web is named web 1.0.
9. 00:52Only a few experts also were able to publish content
10. 00:57to understand the HTML, to design such HTML pages, to set up a
11. 01:02web server to place this resources on the web server and to
12. 01:07make it a weight over the world wide web.
13. 01:10And the resources that were offered over the world wide web
14. 01:14were mostly static. And then
15. 01:18around two thousand it started to change the character of the world wide web,
16. 01:25to change into participation web.
17. 01:29This development we can see up to now, some people
18. 01:33call this web 2.0,
19. 01:37read-write web. In that phase users became able for example by mean of
20. 01:45the ajax technology we discussed already to publish own content
21. 01:49in a very simple way. So it was not more necessary to be IT
22. 01:54specialist everyone could publish content
23. 01:59mainly through the social web
24. 02:01applications, so an important characteristic or the important
25. 02:05character of the web 2.0 is what's also called social web.
26. 02:13In the time although dynamic websites websites become more and more common
27. 02:19so by means of the web programming on client side on server side the
28. 02:25web pages were designed
29. 02:30designed dynamically exactly
30. 02:33according to the wishes and
31. 02:37parameters given by the user.
32. 02:41On the same side webpages become more and more complex,
33. 02:45new technologies allowed the developer to build future rich web-based applications.
34. 02:53This is the web as you know it from today.
35. 02:58But then the next step next phase in development
36. 03:04of the web is sometimes also called web 3.0 serves the semantic
37. 03:10and the service web or the semantic and the execution web.
38. 03:16This is an development still emerging and here its characteristic
39. 03:22that the information becomes machine readable
40. 03:26and understandable.See former phases the web was designed for
41. 03:30humans and humans where the user and interact by the web the information was designed
42. 03:36in a way that it's understandable readable by humans.
43. 03:42But more and more one has detected that the web can also be used
44. 03:49for machine to machine communication, and that machine to machine
45. 03:54communication becomes important if one creates more complex web applications.
46. 04:00For example to produce a dynamic output, a dynamic dynamic webpage,
47. 04:06by means of several web applications placed on different servers in the
48. 04:13in the world that interact, that have to interact to each other to
49. 04:18produce this page the user wants to see.
50. 04:22This is the executing web or the service web if we speak about semantic web.
51. 04:28Today's situation is that search genes are keyboard based
52. 04:34and a search machine looks exactly for the string of characters and then
53. 04:39all the information all the resources available in the web where this
54. 04:44string of characters plays an important role are
55. 04:48shown to the to the user.
56. 04:52But such search machines from today they don't understand the meaning
57. 04:58of this string of characters they don't understand the meaning
58. 05:01of the search term and documents so what we expect in the future is
59. 05:07that and this is an expectation to the so called semantic web
60. 05:12is that it's not only longer, is only the string of characters
61. 05:19that is a machine as the web is understanding but the web has some means
62. 05:25to understand the meaning of this
63. 05:29string of characters.
64. 05:31So the semantic web no longer consists of
65. 05:34stupid documents but of things, of people, of places, of events and
66. 05:40their relations to each other.
67. 05:44And the other important
68. 05:47part or characteristic of this web 3.0 phases are
69. 05:52the service web or web services many web applications become interconnected
70. 05:58through the web service technology we will discuss
71. 06:03as well as semantic web in this week.
72. 06:09But that is not an end of the development,
73. 06:13there's a next transformation starting today,
74. 06:17and this is a mobile web some people call this web 4.0.
75. 06:23Here parallel alternative versions of the existing web
76. 06:28occur and are accessible over smartphones,
77. 06:32so the documents and the resources in the web are designed
78. 06:38also to be usable by such smartphones.
79. 06:42So here is the possibility to add
80. 06:45a new meaning by taking into account the local context
81. 06:51of a person is a characteristic, so the web sees, understand, knows
82. 06:58where the person is located and then
83. 07:02it is able to provide resources that are meaningful exactly
84. 07:07in this local context.
85. 07:10So the largely use of
86. 07:14the service web of web services this is a characterization of this mobile
87. 07:21web as well as a usable
88. 07:23in a mobile way.
89. 07:27This is the end what comes next
90. 07:32how web 5.0 looks like.
91. 07:36Discussion about this
92. 07:39you invite to develop your ideas in our forum and our openHPI for room
93. 07:46to submit your ideas discuss ideas
94. 07:50there are definitely new developments the web can go on and for the
95. 07:57people for the developers of the web technologies, this visions,
96. 08:01this new ideas are very important to think,
97. 08:04to get input for developing new technologies.
98. 08:11So in this week we speak about the social semantic and service web or the
99. 08:21web 3.0.
100. 08:33These three aspects are important social.
101. 08:38What is the social web applications, you know, a lot of them.
102. 08:42How do they how did they emerge how do they work the technology
103. 08:48they are using? We have already discussed for example AJAX
104. 08:51and the main characteristic. I already mentioned is that people
105. 08:55you and me can become resources, can
106. 08:59publish information in the world wide web.
107. 09:03Then we speak about semantic web,
108. 09:07How do today's search engines work and what are their limitations?
109. 09:12What are semantic? And what are the principles of semantic web?
110. 09:17This is what we ask ourself when we discuss
111. 09:21semantic web, what's going on is development and what is the vision.
112. 09:26And then finally we have to consider the service web
113. 09:30how do web services is the enabling technology for the service web
114. 09:36work?How is the technology,
115. 09:40which kind of technology is in place to implement this vision
116. 09:46of a service web?

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