Keyword-based search
Index-Based Search (see here)

• keeps a 'notebook' of searches and articles found, akin to science notebooks in python etc
• when you enter a search displays previous identical searches (and similar searches?)
• displays articles re-appearing in later searches which were already read
• highlights articles appearing in multiple searches
• allows constructing multiple searches into one which highlights articles appearing in all
• adding articles straight into reference manager and then displaying annotations from already read articles next to new searches?
  • perhaps in place of the article they belong to, should another search bring it up again
  • perhaps allow expanding of articles to the side, where their annotations are shown