We will make a historically significant and still personally engaging timeline from a federated wiki of facts and remembrances.
Principles
A single wiki will represent information contributed from or curated by a responsible individual. The vocabulary will be that with meaning to the individual.
A subset of available wikis (a neighborhood) can be treated as a whole for a purpose such as cross-checking or exhibit.
Duplication will be accepted and discrepancy considered just another fact. Forces must be in place to cause the overal drift to be towards improvement.
Exhibits are free to render with what ever mechanisms prove appropriate driven by one more exhibit specific wiki that has pulled from the federation. See Simile Widgets website 
Pages
Pages will be roughly analogous to database records except when they are not. A page will be of a type if it meets the conventions for that type.
A Person is an individual titled by their most significant historical name. Significant aliases or maden names could be their own pages. Collisions of names within a wiki will be resolved by parenthetical classification as in Dave Thomas (businessman).
A Place is a significant location or region. Cities and countries are places as are buildings or rooms. A historical place might not be geolocated, like Air Force One, but this is rare or qualified in context like Air Force One (dallas).
A Thing can be a discrete thing like the Einac or a category of things like the IBM-PC. An organization is a thing, like Bell Labs. A distinctly located thing might also be a place like Mount Rushmore.
An Event is something that happens, usually at a place and involving people. Events have causes and propagate effects. Discrete events often have a prelude and epilog, as in the writing of a book before publication, or an anniversary edition.
A Story collects some combination of people in places with things during events. A story has a message, a conclusion or a moral. A story is assumed to be real unless otherwise noted. Stories may be imprecisely recalled so confirming sources should be included.
A Progression is a sequence of historically significant dates. A person can progress: birth, graduation, retirement, death. A place can progress: construction, opening, closing, demolition. An event can progress: tutorials, reception, keynote, closing.
Links
Pages include links that may or may not be qualified as to specifics of the intended relationship. For mechanical processing systematically qualified links are preferred.
A link may be prefaced with a capitalized qualifying word, possibly hyphenated, and separated by carefully spaced colon as in Father: Famous Person Senior.
A page on a specific wiki can be called out as a Reference. Normally this would only be used to identify present-time operational configurations between specific wikis. The body of the reference include additional qualification such as source or role.
A collection of links may be prefaced by a page fold that is titled in a systematic way such as ...
Investors
Uniformity will be encouraged by providing and sharing page template with sample links employing preferred quantifications. Robots can be dispatched to further check usage and tally statistics.
Plugins
Specialized plugins will collect, check, display and index particularly important data of a few specific types. Markup will include quantifications.
A Date of varying precision can be specified to varying accuracy. Dates can be relative to preceding date when they form a progression.
A Geotag collects spatial information of varying structure and converts it into other useful forms when possible. For example, a location might be entered in lat/lon of various formats or as a string that must be geocoded on save.
A Timeline finds and renders pages from the neighborhood as a scaleable, scrollable visualization. Hover will show details. Click will drill down into the specific pages represented.