Displaying the Mathematical function

XML CDATA

XML Character data (CDATA) is defined as Blocks of texts and a type of XML Node recognized by the mark-up languages but are not parsed by the parsers. This is used to solve the inclusion of the mathematical term in the XML document. To pass a math equation CDATA is used to include in the code section. DATA is meant only for the group of text specifying mark-up like characters. The CDATA section includes all the mark-up characters exactly what they are when they are passed it to the application and eliminates nesting. In simple terms, all the entity references and XML tags are excluded by the processor while parsing and treated as character data.

Web development, programming languages, Software testing & others

Given below is the CDATA syntax:

In the above syntax the first section “ “ just wrapping up with the CDATA tag, the characters in the code sections are treated as only text not as mark-up which may also include special characters. The XML mark-up is embedded which are not interpreted. Any content that is declared inside the is ignored by the XML Processor and almost it is equivalent to the comment section in XML.

How CDATA works in XML?

Some reserved characters in PCDATA are not allowed in the XML document during parsing which would give an error in the browser. To get around this we use CDATA section, inherited from SGML. While Executing the file a node with CDATA keyword section is parsed, the parser skips the inner data of Sections. And this special node views like a cross between an element and text also includes opening and closing tags where the text could be multi-lined. The aim objective is to include XML fragments.

Let’s take a sample of an XML document:

[CDATA(«most existing feature ability to inherit») providing XML- data with standards:
Here the characters are formatted with CDATA. For CDATA,the character entity is restricted as it generates issues when exporting data with dataset appearing like processing instructions.

The following is invalid as CDATA is nested:

So, the above line is written as two parts as follows. This is the exact way to put a section end inside a CDATA section. By which replace]] > in the specified data with]]]] > so that “>” is perfectly away from the brackets (as we broke the bracket sequence). And when the parser looks out for ]]> it is specified as the three-character sequence.

Now let’s see the document which is listed below:

They are helpful when we need to embed another xml document in the existing xml document.

The sample is given below:

Though with certain benefits of CDATA, clearly it has some limitations too, CDATA does go well with html and XHTML. There are few possibilities in losing the contents. Since CDATA cannot be nested section end is made more special. Last point is size of the section that is important while transferring XML file with large amount of information.

Examples of XML CDATA

Given below are the examples mentioned:

Example #1

Enclosing the character entities with CDATA in xml file.

So in the Result output, there is a white space after the CDATA sections.

Example #2

CDATA with mathematical expression to be included in the XML file.

This example Shows how to display a CDATA when Special characters are included

Example #3

HTML file inside CDATA part.

B
Bold
Bold the letters in the content Nextpart.
]]>


Element
Doc Type Element

Sample XML Code

Make a paragraph change
/HTML>
]]>

Example #4

Embedding JavaScript or any style sheets in CDATA section.

Probably if suppose there is a situation in including JavaScript in XML code then here is the solution by imposing them in CDATA. The “” are likely to be wiped by the equivalents &lt and &gt.

«http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd»>

Cdata in Xhtml- demo

Example #5

«http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd»>

XHTML Page- CDATA

I think java would dominate the Programming Landscapeeffectively
java.

java version:

I think java would dominate the Programming Landscapeeffectively
java.

CDATA Sectionpart:

well,
I think java would dominate the Programming Landscapeeffectively
java.

]]>
in current trends?

Conclusion

Therefore, in this article, we have seen what is CDATA all about and have analysed how to escape special characters while using in the CDATA section. It has many business impacts when the tags are used improperly, but has good performance when utilized properly. And CDATA is been used when they are need of large amount of texts to appear in the XML documents. The overall summary is while using CDATA to embed mark-up in XML document benefits us from having to encode the data, care should be taken with the effect of the client-server communication.

Recommended Articles

This is a guide to XML CDATA. Here we discuss the introduction to XML CDATA, how it works in XML along with examples respectively. You may also have a look at the following articles to learn more –

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Что означает в XML?

Я заметил, что этот тег CDATA всегда приходит в начале, а затем сопровождается некоторыми вещами. Но иногда он используется, иногда это не так. Я предполагаю, что это означает, что some stuff — это «данные», которые будут вставлены после этого. Но какие данные some stuff ? Разве я ничего не пишу в тегах XML какие-то данные?

11 ответов

• Как указывает Ричард, CDATA все еще является частью документа, а комментарий отсутствует.
• В CDATA вы не можете включить строку ]]> ( CDEnd ), а в комментарии — недействителен.
• Параметры Entity не распознаются внутри комментариев.

Это означает, что эти три фрагмента XML из одного хорошо сформированного документа:

 and other reserved characters like

An example of escaped CENDs --> in the second CDATA block --> ]]> in the second CDATA block -->  

У вас должно быть два раздела CDATA для объединения ]] и > — посмотрите этот ответ, чтобы узнать, как и почему.

У меня есть позиция отображения горячей точки в виде cdata в XML-файле, например, clickMap_item_9510 . Может кто-нибудь помочь мне, как правильно отобразить его в html5? Единственное, что мне удалось с ними сделать, это отобразить в виде обычного текста.

Таким образом, этот фрагмент кода, подобного C, не может быть легко помещен в раздел CDATA: if (a[b[c]]>10) < >.

Хороший вопрос! Рассматривая 4.4 Обработку сущностей и ссылок в XML-процессоре, можно увидеть, что ответ «нет» (потому что сущность сначала раскрывается, а затем проверяется правильность текстового содержимого).

Синтаксически он ведет себя аналогично комментарию:

  but my document is still well-formed! --> 

. но он все еще является частью документа:

  but my document is still well formed! ]]> 

Попробуйте сохранить следующее как .xhtml файл (не .html ) и откройте его с помощью FireFox (не Internet Explorer), чтобы увидеть разницу между комментарием и секцией CDATA; комментарий не появится при просмотре документа в браузере, в то время как раздел CDATA будет:

      
Using a Comment
 
 & " -->
 
Using a CDATA Section
 
 & " ]]>
   

Что-то, что следует учитывать в разделах CDATA, заключается в том, что они не имеют кодировки, поэтому нет возможности включить в них строку ]]> . Любые символьные данные, содержащие ]]> , должны, насколько мне известно, быть текстом node. Аналогично, с точки зрения DOM-манипуляции вы не можете создать раздел CDATA, который включает ]]> :

var myEl = xmlDoc.getElementById("cdata-wrapper"); myEl.appendChild(xmlDoc.createCDATASection("This section cannot contain ]]>")); 

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How to Insert HTML Content in Xml Document

Is it possible to insert HTML content in XML document?

You can include HTML content. One possibility is encoding it in BASE64 as you have mentioned.

Another might be using CDATA tags.

 
 
 
 
  
 
Your HTML's body 
]]>

CDATA’s opening character sequence:

CDATA’s closing character sequence: ]]>

HTML tags within XML

Using the minimal example you give, the XML validates against the XSD snippet you provide (after adding an xs:schema as a root element.)

example.xsd:

 
 
 
 
 processContents="lax" 
minOccurs="0" 
maxOccurs="unbounded" />

test.xml:

 
 This course is an introduction to the information technologies required for secure, practical information systems for electronic commerce.
Topics will be chosen from areas such as document representation (XML, DTDs, XML Schema, XSLT, CSS), security (encryption, public key, symmetric key, 
PKI, authentication); kinds of attack and vulnerabilities, electronic trading (spontaneous, deliberative, auctions), electronic document management 
(metadata, search, digital libraries, management and processing), recent developments and maturation of the area, 
such as web application frameworks, web services, the semantic web , mobile commerce 

Validation:

$ xmllint --noout --schema example.xsd test.xml 
test.xml validates

So I’m not sure what your problem is.

One problem that comes to mind is you might not be using xhtml. The HTML you include in the description element (or any HTML) must be valid xml (and hence xhtml, not the sloppy sgml-like html syntax), including making any xhtml named character entities (e.g., ) available to the schema validator. Pretty much any html you find on the web will absolutely not be valid xml.

If you want to make the html available to XML processors and validation, use an XHTML 1.0 xsd or (more flexibly) mix and match modules available from XHTML 1.1 and its XSDs.

If this is too much trouble for you and you are ok with treating your HTML content as a blob of text, just include it as text content and modify your xsd schema to expect xs:string or xs:normalizedString as the content of the description element.

Use HTML tags in XML file and display/recognize them later as HTML

It is still not clear what is your problem and what is your goal.

Let me try to do some attempt to help you.

First thing — you have data:

That data portion has html encoded characters. The point is to never mix data with real html or xml.

$this->topics[$page] = $thema->description;

your value still contain html encoded characters:

$this->topics[$page] === `Die Zweckbestimmung ist ein eleme Konsequenzen.`

Which is probably kind wrong from your point of view. But to me I don’t see any problem yet at this moment.

Lets simplify and focus only on this part:

That one of things which are not clear in your data xml there is no field with name questiontext . So lets assume that is topic->question->comment .

How can I include HTML in an XML document?

You can wrap the HTML in CDATA tags (character data) to indicate raw, uninterpreted/unparsed text.

The term indicates that a certain portion of the document is general character data, rather than non-character data or character data with a more specific, limited structure. . In an XML document or external parsed entity, a CDATA section is a section of element content that is marked for the parser to interpret as only character data, not markup.

Add HTML Codes to XML file using PHP

You can use the PHP function createCDATASection to add CDATA to your xml file:

$newGame -> appendChild($scores -> createElement("Header", $_POST['header']));

$h = $scores -> createElement("Header"); //Create a empty tag
$h -> appendChild($scores ->createCDATASection ($_POST['header'])); //Add a CDATA element to it
$newGame -> appendChild($h); //Then append it to the game tag

With the comments, it should be quite straight-forward.

XSLT Insert html content

 
 
 
 
Header
 
some link
 
some link1
 
some link2
 

This stylesheet will do what you want to do:

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