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This is a basic introduction to the CNXML language. It includes a description on how to begin a CNXML module and also examples of the basic tags needed to start writing in CNXML.

Starting with cnxml

CNXML is a lightweight XML markup language for marking up educational content. The goal of CNXML is to conveythe content of the material and not a particular presentation. Connexions uses the Connexions Markup Language (CNXML) as its primary language for storing documents. Now let's get started!

Cnxml tags

Document

All CNXML documents have as their root the document tag. Everything about the document including it's metadata and content are containedwithin the document tag. It is important that you understand the basic structure for a CNXML document. The structure isas follows:

    Document (root tag)

  • Title
  • Metadata Section
  • Content Section

The document tag has one required attribute:

  • id - a unique ID given to the document.
This is automatically assigned.

Id requirements

One major difference between CNXML and other markup languages is the id attribute requirement. Certain tags require that you include the id attribute, but all can possess an id . The tags requiring an id are listed below:

  • document
  • para
  • equation
  • list
  • rule
  • definition
  • exercise
  • table
  • div
  • section
  • subfigure
  • example
  • footnote
  • problem
  • solution
  • block quotes
  • media
  • meaning
  • proof
  • list
  • preformat
  • block code
  • figure
  • block notes
So, if you are going to use any of the above tags, be sure to add the id attribute and give it a unique 'id'. Be aware that in CNXML 0.6 ids will be generated automatically, but you are still permitted to specify you own ids if you wish.

Here is an example of a couple of paras containing a user generated ids.

<para id='uniqueid1'>This is an example to illustrate the use of the<code>id</code>attribute.</para><para id='uniqueid2'>This paragraph has a different id than the last.</para>
Any tag can contain an id attribute. This is useful if you want to link to the information contained in a particular tag.

Namespaces

The document tag should also contain any namespace declarations. Namespaces allow us to easily use other mark-up languages within CNXML without having toworry about whether tag name collision will occur. For simple documents using only CNXML, you need to include theCNXML namespace attribute . Any additional languages need to be declared as well andshould be given their own prefixes. For example, to associate the MathML namespace with the prefix "m",include the following attribute: xmlns:m='http://www.w3.org/1998/Math/MathML' . This states that any tag with a prepended "m" will beinterpreted as a MathML tag while any tag without a prefix will be interpreted as CNXML. The document tag should also contain the metadata namespace xmlns:md="http://cnx.rice.edu/mdml/0.4" , the bibtex namspace xmlns:bib="http://bibtexml.sf.net/" , and the question markup language xmlns:q="http://cnx.rice.edu/qml/1.0" .

This what the document tag should look like.

<document xmlns="http://cnx.rice.edu/cnxml" xmlns:m="http://www.w3.org/1998/Math/MathML"xmlns:md="http://cnx.rice.edu/mdml/0.4" xmlns:bib="http://bibtexml.sf.net/"xmlns:q="http://cnx.rice.edu/qml/1.0" id="m9000" module-id="" cnxml-version="0.6">
Be aware that the you document id can not be the same as this example. Each module will have its own unique id.

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Cnxml tutorial. OpenStax CNX. Jul 08, 2009 Download for free at http://cnx.org/content/col10121/1.10
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