What is .HDL file extension?
File created by HotDocs digital form preparation software; saved in an XML format and contains references to resources used by the program; may reference text templates (.WPT, .DOT, or .RTF files) called "clauses," user answers (.ANX files), or even external Web URLs; also contains a description for each referenced resource.
HotDocs libraries are saved to the following directory:
Templates referenced by HDL files are stored in the following directory:
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.