XMD Edits in Wave Analytics

If you are looking to make changes on names and labels, you would need to go to the XMD file in wave in order to be able to make the change. Wave currently has a heroku app to access this with a User friendly UI.
The site can be accessed from the link below:
https://wave-labs.herokuapp.com/

1. On logging on to this site, the first step is to choose the org type, Production or Sandbox. 
2. Once done, Choose XMD, the JSON and SAQL are now available directly on the wave dashboard. 
3. Choose XMD 
4. Choose a Dataset to get started. 
5. Sometimes it might take you back to the screen where the XMD is given, choose XMD again and then choose the dataset.
6. Your values would be in dimension or measure, date fields would be in date, depending on the structure of your dataset.
7. There are more options available such as derived dimensions, derived measures, organizations. You can add or remove any values on the XMD via the UI. 

Once done Click the save button on the top right so that it is reflected in your JSON file.

Thanks and Cheers! Let me know if you have any better ways to go about this or any questions, will try to reply asap.