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File extension Details of VSDISCO, VBD, ZHTML, ZFO, HTM, HDML, HTACCESS, HTX, HXS

Name:VSDISCO
File Type:DISCO Dynamic Discovery Document
Popularity:3
Category:web
File Description:Discovery file used by Microsoft's Directory of Web Services (DISCO) technology; provides current information about Web service files available on a server; uses the same syntax as a .DISCO file, but is generated dynamically and stored in the Web service application.

VSDISCO files can be viewed in a text editor, but are intended to be referenced by a Web application on the Web server.
Open Programs: Windows Microsoft Visual Studio .NET
Name:VBD
File Type:Visual Basic ActiveX Document
Popularity:3
Category:web
File Description:ActiveX file, also called an "Active Document," created with Microsoft Visual Basic; often hosted on Web servers and can be accessed with a Web browser.

VBD files may require specific ActiveX components to run; if the necessary files are not installed, Internet Explorer users will be directed to the appropriate download page on Microsoft's website.
Open Programs: Mac OS Web browser with ActiveX installed Windows Web browser with ActiveX installed
Name:ZHTML
File Type:Secure IE Zipped HTML File
Popularity:3
Category:web
File Description:Web page saved by Secure IE, a Web browser that is similar to Internet Explorer, but includes additional security features; stores the HTML and images from the Web page in a single compressed file.

NOTE: Secure IE requires Internet Explorer to be installed in order to run.
Open Programs: Windows Winferno Secure IE
Name:ZFO
File Type:XSL-FO Online Form
Popularity:3
Category:web
File Description:Online form that saves data in a standard XML format; also called an XSL-FO or XSL form; XSL-FO is a markup language that defines how the XML data is formatted; ZFO files are often used for online forms, such as registration forms; they can be filled out using the 602XML Filler.

Most XSL-FO forms use the .FO extension
Open Programs: Windows Software602 602XML Form Filler
Name:HTM
File Type:Hypertext Markup Language File
Popularity:5
Category:web
File Description:HTML Web page that contains code which displays and formats text and images in a Web browser; ".htm" is the extension typically used by Microsoft FrontPage or newer Microsoft Web development programs such as SharePoint Designer and Expression Web.

HTML files are more commonly seen with the file extension .HTML.
Open Programs: Mac OS Any Web browser
Edit with Adobe GoLive or Dreamweaver
Edit HTML with a text editor Windows Any Web browser
Edit with Adobe GoLive or Dreamweaver
Edit HTML with a text editor
Name:HDML
File Type:Handheld Markup Language
Popularity:2
Category:web
File Description:Web page similar to an .HTML file, but used specifically for wireless/mobile devices, such as cell phones and PDAs; an extension of the SGML language, which is used for creating .SGML files; can be viewed in a compatible Web browser or mobile device.
Open Programs: Mac OS A compatible Web browser Windows A compatible Web browser
Name:HTACCESS
File Type:Apache HTACCESS File
Popularity:3
Category:web
File Description:Configuration file used by an Apache Web server that provides instructions for different directories of a website; "htaccess" is short for HTTP access, which is the protocol used for transmitting Web pages.

The .htaccess file can used to perform several important functions such as:

  • Define the index page of a directory (i.e. "index.html" or "index.php")
  • Specify the 404 (Page not found) error page
  • Perform 301 or 302 page redirects
  • Deny access from specific IP address or other websites
  • Restrict access to certain directories and pages
  • Execute MOD_REWRITE instructions


The .htaccess file is always named ".htaccess" and does not include a filename before the dot; it is placed in the root directory of a website and is processed by the Web server each time a Web page is accessed.

The Apache .htaccess Tutorial includes additional information about how and when to use .htaccess files.
Open Programs: Windows Apache Web server
Edit with any basic text editor Linux Apache Web server
Edit with any basic text editor
Name:HTX
File Type:HTML Extension File
Popularity:3
Category:web
File Description:HTML document that uses the Microsoft Indexing Service; contains code that defines how results from a database should be displayed within a Web page; often created with Microsoft FrontPage Web development software.

HTX files should be saved in the same directory as the corresponding Internet Database Connector (.IDC) file; they will only be processed by a Web server that supports Microsoft Indexing Service.
Open Programs: Windows Microsoft FrontPage
Edit with a text editor
Name:HXS
File Type:Help 2 Compiled Help File
Popularity:3
Category:web
File Description:Help file compiled for Microsoft Help 2.0; contains help documentation for Windows or other programs; uses HTML for content and XML for metadata.

HXS files are similar to .CHM files, which are used by Help 1.x, but are formatted differently; they are created using the Microsoft Help 2.0 Compiler.
Open Programs: Mac OS View in a Web browser
Windows Microsoft Help 2.0 Workshop
Help Explorer Viewer
Viewable in a Web browser
Linux Help Explorer Viewer
Name:HTML
File Type:Hypertext Markup Language File
Popularity:5
Category:web
File Description:Web page coded in HTML that can be displayed in a Web browser; formats text, tables, images, and other content that is displayed on the page; HTML source code is parsed by the Web browser and typically not seen by the user.

The raw HTML can be viewed by choosing "View Source" from a Web browser's View menu; HTML files can also be opened and edited with a basic text editor.
Open Programs: Mac OS Any Web browser
Adobe GoLive
Adobe Dreamweaver
Edit with text editor Windows Any Web browser
Adobe GoLive
Adobe Dreamweaver
Edit with text editor

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