Yes, you can call it sharing if you put a Creative Commons license on any digital file. But how open is it and useful to others if it is either in a file type that requires special, proprietary software, or is in a file format that only allows viewing as a whole?
Can you make a case for going beyond legal openness?
Find something you may have shared yourself under a CC license, or that your employer/ organization has shared that could be done in a more technically open format. See Wikimpdia’s list of open file formats for possible alternatives. Create a prototype of this alterative format, and then write a blog post, or write and email to your colleagues making a case why an open format for their content is more reusable and will have a longer shelf life.
Example for "Make a Case for Legal AND Technical Openness":