A namespace is a name that identifies you. It is used for labelling any stitch libraries or style sheets that you create. Having a namespace that is unique allows you to share files with others. Stitchmastery does not check or enforce this, so choose something that no-one else is likely to choose. If you are the owner of a domain name, this would be a good choice.
If you do not have an internet domain name then another possibility is to use an email address. Also many social media sites such as Twitter or Ravelry require you to have a unique username so another possibility would be to use the name of the social media site followed by your own username, for example, 'www.ravelry.com.funkyorange'.
Choose your namespace carefully. It is possible to change it later using . Chart Diagram files use both name and namespace to identify stitch libraries and stylesheets. For this reason, it is not possible to change the namespace of stitch libraries or style sheets once they are created. → →