Metadata

Operators and keywords that get or set metadata.

attr

Attributes of a list

cols

Columns of a table

fkeys

Foreign keys of a table

key

Variously:

  • Keys of a dictionary
  • key columns/s of a keyed table
  • contents of a filesystem directory
  • whether a file exists
  • whether a variable name is in use
  • name of the table linked to by a foreign-key column
  • type of a vector
  • name of an enumerating list
  • a synonym for til
keys

Primary key column/s of a table

meta

Metadata for a table

# Set Attribute

Set the attribute of a list

tables

List of tables in a namespace

type

Datatype of an object

.Q.ty

Datatype as a character code

value

Variously

  • values of a dictionary
  • value of a variable passed by name
  • symbol vector of an enumeration
  • metadata of a function
  • metadata of a view
  • decomposition of a projection or composition
  • internal code of a primitive
  • original map of an extension
  • internal code of a primitive function
  • the result of applying the first item of a list to the rest of it
  • the result of evaluating a string
view

Expression defining a view

views

List of views in the default namespace

.Q and .z namespaces