Following thought experiment should explain what I mean. Question is that is the existence of personal information in digital identity really relevant to its definition? Digital identity does not seem to be linked to anything that people refer to as identity. I googled digital identity definition and the results mostly are that it is a set of digital attributes, which include personal information, which are used to identify the communication source by other virtual entities. Digital identity in technical terms is something that we control that can be considered as an entity, which interacts with something virtual.
When we create an account in a virtual environment like Facebook, we have essentially created a digital identity.