Difference between XML and HTML

XML and HTML are markup languages ​​that are defined for different purposes and have some differences. The previous difference is that in XML there are provisions for defining new elements while HTML does not provide a specification for defining new elements and using predefined tags. XML can be used to build a markup language whereas HTML itself is a markup language.

HTML (Hypertext Markup Language) is designed to facilitate web-based document transfer. In contrast, XML was developed to provide interoperability with SGML and HTML and ease of implementation.

XML definition

XML (Extensible Markup Language)is a language that allows the user to define a data representation or data structure in which a value is assigned to each field in the structure. IBM compiled it as GML (Generalized Markup Language) in the 1960s. When the IBM GML was adopted by ISO, it was named SGML (Standard Generalized Markup Language) and it was the basis for a complex documentation system. The XML language provides a platform for defining markup elements and generating a customized markup language. In XML to create a language or elements, one must follow some rules defined in XML. XML documents include data as strings and text surrounded by text markup. The basic units in XML are known as elements.

XML is a well-established and valid markup language. Here a well-formed specifies that the XML parser cannot pass code if it is filled with syntax, punctuation, grammar errors. Moreover, it is only valid until it is well formed and valid means that the element structure and markup must match a standard set of rules.

XML documents involve two parts – prologue and body. The prologue part of XML consists of administrative metadata such as XML declarations, optional processing instructions, Document type declarations and comments. The body part is partitioned into two parts – structural and content (Present in plain text).

HTML definition

HTML (Hypertext Markup Language)is a markup language for building web pages. The markup command used in web-based content signifies the document structure and layout to the browser. The browser simply reads a document with HTML markup in it and renders it on the screen by inspecting the HTML elements placed in the document. HTML documents are considered text files that hold information that needs to be published.

Embedded instructions are known as elements that represent the organization and presentation of a document in a web browser. These elements consist of tags inside corner brackets that surround some text. Tags usually come in pairs – start and end tags.

Features in XML

  1. XML tags have not been determined beforehand, so here we need to determine the special tags that we will use first.
  2. XML is used to carry data, not to display it.
  3. The code in XML is very easy to understand
  4. Format XML is very well structured and easy to read and write from the program.
  5. XML is an extensible and extensible markup language.


Features in HTML

  1. The language used in HTML is a simple language and supports the creation of website pages.
  2. HTML is quite a lot in providing support for content insertion HTML multimedia(for example: image insertion,HTML video,HTML youtube video, and so forth).
  3. HTML is also very flexible in supporting Hypertext linking.

Pros of Using HTML

  • Interfaceor a browser interface for easy-to-create HTML documents.
  • HTML language is very easy to understand for everyone because it has a very simple syntax.
  • We can use many tags to create web pages.
  • HTML can also be used for various purposes such as color, objects and layout.

Advantages Using XML

  • XML can be used to make documents transportable or transportable across various systems and applications.
  • XML helps us to be able to exchange data quickly between various platforms.
  • XML is used to separate data from HTML.
  • XML can also be used to simplify the platform change process.

Disadvantages of Using HTML

  • HTML lacks syntax and structure checks.
  • HTML cannot be used for data exchange.
  • HTML does not allow us to describe the content or content of information.
  • HTML is not object-oriented, so HTML is not a language we can develop into and is very unstable.
  • Data exchange or data storage in HTML cannot be done.

Disadvantages of Using XML

  • XML must require a data processing application.
  • The XML syntax here is very similar to other text-based data delivery formats which can be a bit confusing for the user.
  • XML syntax usually has redundancy or syntax reuse created.

Key differences between XML and HTML

  1. XML is a text-based markup language that has a self-describing structure and can effectively define other markup languages. On the other hand, HTML is a predefined markup language and has limited capabilities.
  2. XML provides the logical organization of the document while the predefined HTML structure in which the “head” and “body” tags are used.
  3. When it comes to types the HTML language is case-sensitive. In contrast, XML is case-sensitive.
  4. HTML was designed with an emphasis on data presentation features. In contrast, XML is data specific in which data storage and transfer is a major concern.
  5. XML doesn’t allow any errors if there are some errors in the code that can’t be parsed. In contrast, in HTML minor errors can be ignored.
  6. White spaces in XML are used for special uses because XML considers every single character. In contrast, HTML can ignore whitespace.
  7. Tags in XML must be closed, whereas in HTML open tags can also function properly.
  8. Nested in XML must be done properly, this has great importance in XML syntax. In contrast, HTML doesn’t really care about nesting.

Examples of XML Applications

There are several examples of implementing XML in programming that I’ve come across:

  • XML is used to carry data on the SOAP serpti API;
  • XML is used to build form structures in desktop programming such as delphi, lazarus, vb, gtk, etc .;
  • XML is used to create android application layouts;
  • XML is responsible for constructing the project structure in Java using Maven;
  • XML is used as the file format for SVG, DOCX, etc.
  • and many more examples of implementing XML.


XML and HTML here have many advantages and disadvantages for users.

This usage depends on our desires, such as: HTML is widely used to create views for website pages and many things about how to display information or data, while XML here plays more of a data transport used to carry data so that it can be used to switch platforms just got easier.



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