Meta 

+ Labels

-- Multilingual main label (no sources, no qualifiers)

-- Multilingual alternative labels (no sources, no qualifiers)

-- Multilingual historic/alternative labels (will be possible with monolingual datatype+qualifiers) 

-- External identifiers (currently treated as statements)

-- Sitelinks (how each project calls the concept)

+ Metainformation

-- Concept taxonomy (part of/ subclass of)

-- Concept life-cycle (sometimes irrelevant, other times expressed with start/end date, no deprecation possible)

-- Concept precedence (possible to express as statements "succeeded by"/"preceded by", but perhaps needs disambiguation from content)

-- Concept dependence (endemic to, bound to [experience/cognition/etc], recognition methods, etc)

-- Source for the concept (not defined, sometimes irrelevant)

Content

+ Current information

-- Statements

+ Historic information

-- Deprecated statements

+ Open data information

-- Related to outcome on RFC about open datasets