Result:

View creation:

view columns {items ...}
view as cmdname
view var varname

view

View cleanup:

rename cmdname {}
unset varname
viewref varname ...

Combining views:

view concat view2
view pair view2

view
view

Disecting a view:

view maprow {rowindex ...}
view mapcol {colname ...}
view slice offset size ?step?

view
view
view

Relational operations:

view project {colname ...}
view product view2
view join1 view2
view join0 view2
view divide view2

view
view
view
view
view

Set operations:

view union view2
view except view2
view intersect view2

view
view
view

Transformations:

view filter condition ?param ...?
view pick {flag ...}
view rename colname newname
view reverse
view rowid colname
view sort ?{colname ...}?

view
view
view
view
view
view

Informational

view rows
view cols
view names
view types

integer
integer
string list
string list

Data extraction:

view at rowindex colname
view get rowindex
view row rowindex
view col colname
view all

item
paired list
list
list
list

Modifying a view:

view set rowindex colname item
view add {item ...}
view insert rowindex default
view delete rowindex
view addcol colname expression ?param ...?
view delcol colname

item
integer