An incomplete investigation into the be-all/end-all of information organization structures.
Successful Information Organization StructuresFile SystemsClassical file systems have directories and files arranged in a tree.
Directories have dual roles: they
contain files, and they provide a
namespace for files.
File systems are frequently criticized, but containment and namespacing are critical features, so I don't believe they will ever go away.
WikisThe most prominent feature of wikis is the emphasis on
naming and
ergonomic linking, that is, links between pages can be created easily.
Some wikis provide
backlinks, but for some reason these are usually not featured prominently.
BlogsBlogs put (reverse)
chronology center stage, and have been hugely successful with that simple device.
OutlinesOutlines, like directories, provide
containment, but unlike directories,
no namespacing.
Outlines are most useful for their
graphical properties: collapsing stuff you don't want to see, and expanding stuff you want to see.
DatabasesDatabases' main features from an organizational perspective are that they usually store
complex objects (tuples, documents, ...) and provide
sorting by attribute and sometimes more complex queries.
Unlike the other systems, databases are usually of no use for ad-hoc work, and instead require programmers to create a user interface for the stored information.
Tagging SystemsTagging systems associate keywords with items, and can
return all items with one or more keywords.
Tagging systems can be viewed as a special case of search engines that only index terms the user has chosen for indexing, which leads to interesting social effects and good results in many cases (cf. Delicious).
Search EnginesSearch engines take in a corpus of unstructured documents, and answer similarly
unstructured queries, and usually employ
ranking, such as PageRank.
Search engines are different from all the other systems, in that they don't require the user to organize information herself, but rather impose some organization of their own.
Typed LinksSystems that support typed links allow items to be connected arbitrarily with edges, and to
follow incoming and outgoing edges from an item.
Spreadsheets (I can't believe I forgot those in the first version!)Spreadsheets let you put data into a
two-dimensional row/column form, and then filter, sort, and otherwise manipulate the data. Spreadsheets also come with
formula libraries for doing a lot of different stuff.
Spreadsheets are often abused, but still a major workhorse of information organization.
Common HybridsMany attempts have been made to combine one or more of the above structures:
Outline + DatabaseMany advanced outliners let users add attributes to items, which are displayed in columns.
Wiki + Blog"Bliki" systems are wikis that usually display a blog on their front page.
File System + DatabaseAn example would be BeFS which indexes user-defined attributes on files.
Search Engine + DatabaseThe goal here is to extend a search engine so that it can also answer queries for attributes of items, and interpret e.g. numeric attributes.
Wiki + DatabaseWikis with database functions allow users to add attributes to pages, upon which one then can sort and filter pages.
Anything + Tagging SystemAnything + Search EngineTagging systems and search engines can easily be added to any other structure.
Can we combine them all?
File System + Wiki + Blog + Outlines + Tags + Typed Links + Spreadsheet + Database + Search EngineLet's get rid of wikis and blogs:
Wiki = File system with only one directory + Simple LinkingBlog = Database query for items, sorted by timeSo, if we provide simple linking in the user interface, and keep file system and database functionality, we can drop wikis and blogs from the list.
File System + Outlines + Tags + Typed Links + Database + Spreadsheet + Search EngineLet's get rid of outlines and tags, shall we?
Outline = Items have typed links to child itemsTagging = Items have typed links to tag itemsThis means, if we keep typed links, we can drop outlines and tags from the list:
While we're at it, we can also drop spreadsheets from the list, as
Spreadsheet = 2D view of items with attributesNote that this doesn't cover every (ab)use of spreadsheets, but should do for now.
Super-Structure = File System + Typed Links + Database + Search Engine ???To be continued...
(Yeah, I know, this isn't super-convincing just yet.)