categories of features for the website

Although the Physics Derivation Graph is currently available as a website (http://derivationmap.net/) I am unwilling to share the URL with other people. The lack of features means they could get the wrong impression.

There are lots of missing features which result in an inadequate site. The categories of missing features are

• essential functionality. Examples: 
• entering symbols
• entering units and dimensions for variables
• unit checking
• dimensional analysis
• search
• ease of workflow. Examples: 
• display latex expression along with ID in dropdown
• static sitemap
• professionalism. Examples:
• Google Sign In

There are additional features that are not vital to showing other users. For example, the "monitoring" page and tracing user behavior.