Difference between revisions of "MediaWiki workshop curriculum"

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== Advanced wiki concepts ==
 
== Advanced wiki concepts ==
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=== Security ===
 
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The MediaWiki software was designed from the outset with openness in mind and for this reason not much consideration went into the design with respect to content restriction. The general problem with implementing a proper security solution is that although most of the actions one can perform on articles can be restricted easily, the ability to '''read''' content cannot be easily restricted on a per-title basis. The reason reading is difficult to restrict is because it's an operation which is not just performed via one action, but rather that many different actions, special-pages and extensions access article content and display it in diverse ways. To make matters worse, many of these diverse means of article access are done by querying the database directly rather than going via the Article class.
 
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To allow restrictions on the reading of article content requires a hook at a very low-level in the programming which is common to all the kinds of operations involved in the retrieving of article content. We use the [[MW:Extension:SimpleSecurity|SimpleSecurity extension]] which adds these low-level hooks into the code dynamically and uses them to extend the native MediaWiki permissions system to include a "read" action in the restrictions list. Following is a description of the specific functionalities which are added or extended and how to use them.
 
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==== "Read" restriction added to protect tab ====
 
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It seems that the main code-base development won't have a solution to the read problem for some time, but the current method of article protection already allows for restricting edit, create and move actions by group, and allows for the possibility of other actions to be handled, so the approach that Simple Security 4 has taken is to add a new restriction to the existing protection page called ''read'' which you can see in the images below which show the protection page with and without Simple Security installed.
 
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{|
 
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!Protection form without SimpleSecurity
 
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!
 
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!Protection form with SimpleSecurity
 
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|-
 
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|[[Image:Protection form without Simple Security.png|400px]]
 
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|        
 
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|[[Image:Protection form with Simple Security.png|400px]]
 
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|}
 
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The image on the right shows the additional '''read''' restriction has become available. Also the tick-box which is used to allow adjustment of the restrictions individually is changed to be more general so it will be appropriate for any number of additional restrictions.
 
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==== Extra groups added to protection tab ====
 
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To have extra groups available in the select box for each action (like "Security test group" in the picture above), add them to the ''$wgSecurityExtraGroups'' array in your LocalSettings.php file, for example:
 
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<source lang=php>
 
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$wgSecurityExtraGroups = array(
 
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    'foo' => 'Foo group',
 
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    'bar' => 'Bar group'
 
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);
 
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</source>
 
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The index should be the internal name of a group (as seen in the user rights special page etc), and the value is a more friendly name shown in the protection form. There should not be any actions specified in that array it's just for adding groups into the protection form.
 
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In MediaWiki 1.13.x you can only assign extra groups that you belong to.  Extra groups that you do not belong to will show up as blanks in the group selection boxes. ([[Extension talk:SimpleSecurity#$wgSecurityExtraGroups in MW 1.13|disc]])
 
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==== Restriction by category & namespace ====
 
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Category-based permissions are now be handled from [[Manual:LocalSettings.php|LocalSettings.php]] for efficiency reasons and will not inherit more than a single level. Namespace permissions are now also be supported, both will be defined in the ''$wgPageRestrictions'' array which uses a format as follows:
 
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<source lang=php>
 
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$wgPageRestrictions['Category:Foo']['action1'] = array('group1', 'group2');
 
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$wgPageRestrictions['Namespace:Bar']['action2'] = 'group3';
 
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</source>
 
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This example restricts article in [[:Category:Foo]] such that only members of groups ''group1'' and ''group2'' can perform "action1". And "action2" can only be performed by ''group3'' for all articles in the "Bar" namespace.
 
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Restrictions set in ''$wgPageRestrictions'' can be overridden by those in the article's ''protect'' tab.
 
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==== Security-based conditions ====
 
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SimpleSecurity adds two parser-functions for rendering content conditionally based on security permissions or group membership. Here's a couple of examples,
 
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<pre>
 
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{{#ifusercan:edit|Main page|Check the homepage editing [[todo list]]!|check the [[latest news]]!}}
 
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</pre>
 
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This example renders a link to a todo list if the user has permission to edit the main page, otherwise a link to the news is rendered instead.
 
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<pre>
 
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{{#ifgroup:sysop|Check the homepage editing [[todo list]]!|check the [[latest news]]!}}
 
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</pre>
 
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Here's the same example again, but this time the conditions is whether or not the user belongs to the ''sysop'' group. A comma separated list of groups can be used for the group parameter in which case the condition will evaluate to true if the current user belongs to any of the groups in the list.
 
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;Notes
 
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*The last parameter is optional and defaults to an empty string if not supplied
 
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*The [[MW:Extension:TreeAndMenu|TreeAndMenu extension]] can be used with these options since it doesn't render nodes with no content
 
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==== Security information ====
 
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Articles which exhibit restrictions either from the ''protect'' tab or from ''$wgPageRestrictions'' can optionally have the information displayed by setting the ''$wgSecurityRenderInfo'' global variable to ''true''. A link will be rendered entitled ''Security information'' which when clicked will reveal (or hide) the list of restrictions exhibited by the article. The show/hiding link is of the CSS id ''security-info-toggle'', and the list of restrictions is contained in a ''div'' of id ''security-info'', so a custom style can easily be applied by adding some CSS rules to your [[MediaWiki:Common.css]] article. For example the following rule gives a border and background to the listed rules when they are visible.
 
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<source lang=css>
 
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#security-info-toggle {
 
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    background: transparent url(/wiki/skins/monobook/lock_icon.gif) no-repeat scroll left center;
 
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    padding-left: 16px;
 
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}
 
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#security-info {
 
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    border: 1px solid #ccc;
 
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    background: #eee;
 
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}
 
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</source>
 
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==== Unreadable links ====
 
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''Still has some bugs to iron out''
 
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If the <tt>$wgSecurityAllowUnreadableLinks</tt> global is set to ''false'' (default), then links to local articles which the current user does not have permission to read are rendered as plain text rather than a hyperlink.<div class=visualClear></div>
 
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[[Image:Unreadable links.png]]<div class=visualClear></div>
 
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The image above shows a small fragment of a recent changes list. Notice that the ''Sandbox'' article title and its ''diff'' and ''hist'' show up grey and are not links, their style can be set in CSS by addressing the ''unreadable'' class attribute.
 

Revision as of 08:45, 13 January 2009

Template:MWW

Info.svg This article is being merged with MediaWiki workshop

Presentation

Intro 2 min

  • Why are you here?
  • What are some of the jargon terms you have heard?
  • Establish wiki's context in terms of internet technology. Eg web 2.0, blog, wiki semantic, google, social network.

Why should you care? 2 min

How this intro to wikis will help you:

  • a primer on a better way to communicate (in your office, with your customers, you customers with you)
  • new skills
  • contribute to something you are interested in

Wiki Quotes

  • Wiki puts an “Edit” button on the intenet.
  • Putting up a wiki page is like tossing a ball of yarn into a basket of kittens. -- Peter Merel
  • Wiki takes you out of the arm chair and puts you in the pilots seat

What are some issues you are interested in ? 5-10 min Wikipedia….then

  • might want to have some local "hook" for the audience. I also asked the audience what they cared about, did a sample search on google to show how "high" wikipedia scored in the results for their subject of interest, and then showed them how to "edit the internet" in an area that they care about most. examples were:
  • watercolor
  • skiing
  • renewable energy

A wiki is the easiest way to add what you know to a place where other people care about what you care about.

Problem: 4 min

Communication is where everything starts. And stops. Problem: communication is the #1 problem in business. Just this morning I was waiting at the doctor’s office, and the lady sitting next to me showed me some paperwork her doctor had sent her, complete with an address, social security number, and a detailed description of the health problem…of a person that she didn’t even know! Wiki’s don’t fix that kind of problem, but it illustrates the types of problems we have in business with communiation.

Email is a solution that everyone uses to communicate. Why? Because it is so easy. But have you ever sent a message that you wish you hadn’t? Email is easy, but think of all the problems it can cause. I worked for the University Of Colorado Health Science Center. Mr. Anschutz, the former CEO of Qwest and Denver Billionaire, had just donated a huge sum of money to the university, and they were going to name the new campus after him. So a press release was sent out via email. Usually, spell check is a good thing. But this time, everyone got word that Mr. Auschwitz had donated a large amount of money, and the new campus would bear that name. (OOPS!)

wiki vs. email

Wiki’s don’t fix that kind of problem, but it illustrates the types of problems we have.

Wikis put everyone on the same page. Literally. Here is a good example…

Show youtube video: http://www.youtube.com/watch?v=-dnL00TdmLY

Types of communication.

(have them give examples)

  • One to many
  • Many to one: election process/democracy.
  • (Many to many
    • forum
    • Blog

How many of you have heard about a Blog? (some of these terms sound like a 3 year old talking! Did you read my blog about google? Do you think google googled my blog yet? )

  • Wiki

Examples Wikipedia

So, to recap…

  • Wiki takes you out of the arm chair and puts you in the pilots seat
  • A wiki is the easiest way to add what you know to a place where other people care about what you care about.
  • Wiki puts an “Edit” button on the Internet.
  • Wikis put everyone on the same page. Literally.
  • Wikis are one of the many imperfect way to address communication issues. Blogs are another.
  • Which do you think is better? Optional: Show blog vs. wiki video: http://www.youtube.com/watch?v=AsFU3sAlPx4

Open up for questions…

we don’t know where this is headed…

History of Internet in 2 Minutes

Communication is the key term. Break the word apart: Community. Communion. Togetherness. Understanding. Technology just gets us to the bottleneck quicker.

  • 1.0 (90-2000) The Techy People could write, everyone could read. Email is lowest common denominator, the "killer app" One to many communication in the form of the web browser.
  • 2.0 (2000-2005) Wikis, blogs, facebook etc anyone can contribute. many to many communication
  • 3.0 (2005-?) The "semantic web". Data will start to organize itself intelligently, beginning of a new era in data. There is no "killer app"! web3 is the ability for the many diverse applications to dynamically "mash-up" in response to demand.

Everyone is talking about how to represent massive amounts of data that we have collected. The new internet will probably be more like a video game than the flat static web pages we are used to. Look how quickly youtube has taken over. I watch LOST on the internet now! You can watch a ball game on your PHONE!

  • 4.0 (P2P) the decentralising of the web using open source grid and distributed computing technology.

How a Wiki works

A wiki engine is hosted on a computer server and uses the internet protocol http to allow many people to collaborate online using a web browser on their own computer.

  • Web browser
    • currently, least common denominator in computer technology
  • Makes it easy to change the "recipe" for process or update information.
  • Tracks changes
  • Makes it easy to correct mistakes
  • A paradigm shift:
    • Open Source - anyone can make improvements. Example-
      • internet itself
      • OpenOffice
  • wiki has caused the concept of a "file" be replaced. The "file" now has all this

historical information intertwined with it and it is never "final" (now called "nodes", metadata)

    • People have access to specific information

*Wiki is a "killer app" for the internet, like Lotus 123(Excel) was back in the 80's

  • effectively combines social networking, forums, email, blogging, and information (?)
  • What might be any reason not to bother using it?

Why should I care?

  • To enjoy life and your job more
  • To familiarize yourself with new technology

A better way to do things

Who would use it?

Anyone who has access to the wiki website that wants to collaborate with other people from anywhere

Who is using it?

  • cutting edge companies
  • mostly small business < 25M in revenues
  • Some big companies: Nokia, Yahoo, Michelin, etc.
  • heard of wikipedia? one of the highest trafficked sites on the internet.

Readers

There are many ways to use a wiki. The most common is to just use it to find information you are looking for. People who use it on this level are referred to as readers. You typically do not need a user account to access content at this level.

Contributors

Readers often become contributers.

  • Recommended Resource: Help

The big picture: Web2.0

This big pitcure view is emerging from a number of technologies and generally refers to the newly emerging collaborative internet which is being dubbed Web2.0. Wiki's have become a major aspect of this new arena with MediaWiki leading the way due to the huge popularity Wikipedia and its sister projects.

  • replace email
  • replace word
  • replace excel
  • replace quickbooks
  • or at minimum will be an integral component of the above.
  • may change how meetings are run.
  • use it the same way that you would a social network site such as myspace.

The Future

The problems with the current wiki paradigm will be the main driving force of its evolution. The main problems that wiki users experience are:

  • Thin client: Currently nearly all processing is handled by the server, so most operations involve communications with the server which makes the environment sluggish compared to normal applications.
  • Wikitext: Users would rather have an applicational means of handling layout of objects and their properties than having to remember syntax. This is currently impractical since for true WYSIWYG the renderer must be tightly integrated with the parser, not an external addon.
might want to mention the fckeditor extension --Phalseid 14:04, 28 December 2007 (NZDT)
  • Web server: The web server paradigm doesn't fit with the new paradigm, it's inefficient on bandwidth and creates reliance on corporate sponsorship and donations rather than utilising the resources of the client-base.

In the future, we can expect to see the wiki methodology showing up in the peer to peer application arena which is currently still in its infancy and contains only static files rather than dynamic applicational content such as collaboration tools.




Advanced wiki concepts

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