Open DTD files

  • Full name
    Document Type Definition Format
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Have you encountered a problem with a DTD file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a DTD file here. In the further part of this page we have added a list of programs that should open your DTD file. It is enough you choose a proper application for your operating system, download and install it.

What is DTD file?

DTD files are called document type definition files. In DTD files are text files that contain, among other things, element types, element attributes, and notations, and specify their order and nesting. A DTD file defines the structure of other XML, SGL, HTML or XHTML documents.

More info

Usually DTD files in a web page are referenced via a URL, so often the xhtml1-transitional.Dtd or xhtml1-strict.Dtd is included via DOCTYPE statement. Furthermore, DTD files are also used to validate documents. For example, XML documents can be checked for correct structure and element properties to ensure that they can be read correctly.

DTD files can be opened and edited in any text editor, but can only be used with an XML editor or other programs that can parse XML, XHTML, HTML or SGL.

Programs which can open a DTD file

How to open file with DTD extension?

In order to open a file with DTD extension one of the following programs must be installed on user’s system. If a problem with opening DTD file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with DTD files, follow the instructions below.
Install XMLSpy or other program from the list

Most often resolving problems with opening DTD files is very simple. Just install an appropriate program that supports such files. All of the listed programs support DTD files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of DTD files or offer file conversion options, but may not be capable of editing such files.

Set XMLSpy as the default program for opening DTD files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate DTD files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the XMLSpy applications is not on the list, select "Browse" option in order to manually locate the directory where XMLSpy has been installed.


Check the section that lists most common problems with DTD files

Sometimes problems with opening DTD files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • DTD files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open DTD files (should that be the case, please contact your system administrator or IT specialist)
  • DTD file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

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