global-features
	'full screen planning' {
		'default zoom level': feature 'zoom level'
		'has more zoom levels': stategroup @default: 'no' (
			'yes' {
				'zoom levels': list non-empty {
					'zoom level': feature 'zoom level'
				}
			}
			'no' { }
		)
		'windows': list non-empty {
			'label': text
			'window': feature 'planning'
		}
	}

	'dashboard' {
		'dashboard': feature 'dashboard 2'
	}

node-features
	'dimension' component unbound {
		'dimension': stategroup @default: 'default' (
			'custom' {
				'width': number
				'height': number
			}
			'default' { }
		)
	}

	'margin' component unbound {
		'margin': stategroup @default: 'default' (
			'custom' {
				'top': number
				'right': number
				'bottom': number
				'left': number
			}
			'default' { }
		)
	}

	'color' component unbound {
		'color': stategroup @default: 'auto' (
			'auto' { }
			'blue' { }
			'orange' { }
			'green' { }
			'red' { }
			'black' { }
			'grey' { }
			'grey light' { }
			'grey dark' { }
			'teal' { }
			'purple' { }
			'hex' {
				'value': text
			}
		)
	}

	'range' {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'range start': stategroup (
			'static' {
				'value': number
			}
			'dynamic' {
				'value': number binding { }
			}
		)
		'ranges': list {
			'type': stategroup (
				'green' { }
				'blue' { }
				'orange' { }
				'red' { }
			)
			'range size': stategroup (
				'static' {
					'value': number
				}
				'dynamic' {
					'value': number binding { }
				}
			)
		}
		'value': number binding { }
		'style': stategroup (
			'progress bar' { }
			'gauge' { }
		)
	}

	'pie chart' {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'query': query binding {
			'label': query text binding { }
			'property': query number binding { }
			'merge small slices': stategroup (
				'yes' {
					'below percentage': number
				}
				'no' { }
			)
			'sorting': stategroup (
				'yes' {
					'direction': stategroup (
						'ascending' { }
						'descending' { }
					)
				}
				'no' { }
			)
		}
	}

	'bar chart' {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'query': query binding {
			'label': query text binding { }
			'style': stategroup (
				'grouped' {
					'bars': list {
						'property': query number binding { }
						'color': feature 'color'
					}
				}
				'stacked' {
					'bars': list {
						'property': query number binding { }
						'color': feature 'color'
					}
				}
				'bar' {
					'property': query number binding { }
				}
			)
			'sorting': stategroup (
				'yes' {
					'direction': stategroup (
						'ascending' { }
						'descending' { }
					)
					'axis': stategroup (
						'single' {
							'sort': query number binding { }
						}
						'sum' { }
					)
				}
				'no' { }
			)
		}
	}

	'line chart query' component query {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'label': query text binding { }
		'lines': list {
			'property': query number binding { }
			'color': feature 'color'
		}
		'style': stategroup (
			'line' { }
			'area' { }
		)
		'sort': query number binding {
			'direction': stategroup (
				'ascending' { }
				'descending' { }
			)
		}
	}

	'chart value' component query {
		'type': stategroup (
			'text' {
				'property': query text binding { }
			}
			'number' {
				'property': query number binding { }
			}
		// TODO 'state group' {
		// 	'property': query stategroup binding { }
		// }
		)
	}

	'2d chart query' component query {
		'title': text
		'x': feature 'chart value'
		'x label': stategroup @default: 'auto' (
			'auto' { }
			'text' {
				'property': query text binding { }
			}
		)
		'format x': stategroup @default: 'auto' (
			'auto' { }
			'day' { }
			'month' { }
			'month and year' { }
			'week' { }
			'week and year' { }
			'custom' {
				'parts': list non-empty {
					'type': stategroup (
						'abbreviated weekday name' { }
						'full weekday name' { }
						'abbreviated month name' { }
						'full month name' { }
						'the locale’s date and time' { }
						'zero-padded day of the month' { }
						'space-padded day of the month' { }
						'microseconds' { }
						'ISO 8601 week-based year without century' { }
						'ISO 8601 week-based year with century' { }
						'hour (24-hour clock)' { }
						'hour (12-hour clock)' { }
						'day of the year' { }
						'month' { }
						'minute' { }
						'milliseconds' { }
						'either AM or PM' { }
						'quarter of the year' { }
						'milliseconds since UNIX epoch' { }
						'seconds since UNIX epoch' { }
						'second' { }
						'Monday-based (ISO 8601) weekday' { }
						'Sunday-based week of the year' { }
						'ISO 8601 week of the year' { }
						'Sunday-based weekday' { }
						'Monday-based week of the year' { }
						'the locale’s date' { }
						'the locale’s time' { }
						'year without century' { }
						'year with century' { }
						'time zone offset' { }
						'percent sign' { }
						'text' {
							'value': text
						}
					)
				}
			}
		)
		'size': stategroup @default: 'small' (
			'small' { }
			'medium' { }
			'large' { }
		)
		'bar mode': stategroup @default: 'grouped' (
			'grouped' { }
			'stacked' { }
		)
		'lines': list {
			'name': text @default: ""
			'y': query number binding { }
			/// setting `y aggregate` switches the default `sum` function to handle multiple y
			/// values on the same x value.
			'y aggregate': stategroup @default: 'sum' (
				'sum' { }
				'minimum' { }
				'maximum' { }
				'average' { }
			)
			'color': stategroup @default: 'auto' (
				'auto' { }
				'custom' {
					'color': text
				}
			)
			'style': stategroup @default: 'line' (
				'line' {
					'stack': stategroup @default: 'no' (
						'no' { }
						'yes' { }
					)
					'shape': stategroup @default: 'linear' (
						'linear' { }
						'horizontal vertical' { }
						'vertical horizontal' { }
						'horizontal vertical horizontal' { }
						'vertical horizontal vertical' { }
						'spline' { }
					)
					'dash': stategroup @default: 'solid' (
						'solid' { }
						'dot' { }
						'dash dot' { }
						'long dash dot' { }
					)
				}
				'area' { }
				'bar' { }
			)
			'partition': stategroup @default: 'no' (
				'no' { }
				'yes' {
					'value': query text binding { }
					'color': stategroup @default: 'auto' (
						'auto' { }
						'custom' {
							'color': query text binding { }
						}
					)
				}
			)
		}
	}

	'line chart' {
		'query': query binding {
			'chart': feature 'line chart query'
		}
	}

	'scatter chart' {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'query': query binding {
			'label': query text binding { }
			'x label': text
			'x property': query number binding { }
			'y label': text
			'y property': query number binding { }
			'style': stategroup (
				'dot' { }
				'connected dot' {
					'sort': query number binding {
						'direction': stategroup (
							'ascending' { }
							'descending' { }
						)
					}
				}
				'bubble' {
					'z property': query number binding { }
				}
			)
		}
	}

	'radar chart' {
		'dimension': feature 'dimension'
		'margin': feature 'margin'
		'query': query binding {
			'label': query text binding { }
			'values': list {
				'property': query number binding { }
			}
			'style': stategroup (
				'spider' { }
				'radar' { }
			)
		}
	}

	'dashboard' {
		'cell width': number
		'cell height': number
		'grid gap': stategroup @default: 'yes' (
			'yes' {
				'size': number @default: 20
			}
			'no' { }
		)
		'widgets': list {
			'x': number
			'width': number
			'y': number
			'height': number
			'widget': stategroup (
				'number' {
					'value': number binding { }
					'number size': stategroup (
						'large' { }
						'fixed' {
							'value': number
						}
					)
					'unit size': stategroup @default: 'auto' (
						'auto' { }
						'fixed' {
							'value': number
						}
					)
				}
				'range' {
					'range': feature 'range'
				}
				'pie chart' {
					'chart': feature 'pie chart'
				}
				'bar chart' {
					'chart': feature 'bar chart'
				}
				'line chart' {
					'chart': feature 'line chart'
				}
				'scatter chart' {
					'chart': feature 'scatter chart'
				}
				'radar chart' {
					'chart': feature 'radar chart'
				}
				'legend' {
					'binding': stategroup (
						'static' {
							'values': list {
								'label': text
								'color': feature 'color'
							}
						}
						'dynamic' {
							'query': query binding {
								'label': query text binding { }
							}
						}
					)
				}
			)
		}
	}

	'dashboard 2' {
		'widgets': list {
			'type': stategroup (
				'grouped charts' {
					'query': query binding {
						'charts': list {
							'widget': stategroup (
								'2d chart' {
									'chart': feature '2d chart query'
								}
								'table' {
									'title': text
									'size': stategroup @default: 'small' (
										'small' { }
										'medium' { }
										'large' { }
									)
									'properties': list {
										'property': query property binding { }
									}
								}
							)
						}
					}
				}
				'tabs' {
					'widgets': list {
						'name': text
						'widget': feature 'dashboard 2'
					}
				}
			)
		}
	}

	'label' component {
		'parts': list non-empty {
			'type': stategroup (
				'static text' {
					'text': text
				}
				'dynamic text' {
					'text': text binding { }
				}
				'dynamic number' {
					'number': number binding { }
				}
			)
		}
	}

	'query label' component query {
		'parts': list non-empty {
			'type': stategroup (
				'static text' {
					'text': text
				}
				'dynamic text' {
					'text': text binding { }
				}
				'query text' {
					'text': query text binding { }
				}
				'dynamic number' {
					'number': number binding { }
				}
				'query number' {
					'number': query number binding { }
				}
			)
		}
	}

	'planning' component {
		'rows': query binding {
			'label': feature 'query label'
			'options': feature 'row options'
			'items': query binding {
				'label': feature 'query label'
				'start': query number requires filter binding { }
				'end': query number requires filter binding { }
				'options': feature 'item options'
			}
		}
	}

	'row options' component query {
		'has filters': stategroup @default: 'no' (
			'yes' {
				'filters': list non-empty {
					'label': text
					'type': stategroup (
						'number' {
							'number': query number requires filter binding { }
						}
						'text' {
							'text': query text requires filter binding { }
						}
						'stategroup' {
							'stategroup': query stategroup requires filter binding { }
						}
					)
				}
			}
			'no' { }
		)
		'has tooltip': stategroup @default: 'no' (
			'yes' {
				'label': feature 'query label'
			}
			'no' { }
		)
		'has group': stategroup @default: 'no' (
			'yes' {
				'group': query text binding { }
			}
			'no' { }
		)
		'has children': stategroup @default: 'no' (
			'yes' {
				'rows': feature 'planning'
			}
			'no' { }
		)
		'filter start and end': stategroup @default: 'no' (
			'yes' {
				'start': query number requires filter binding { }
				'end': query number requires filter binding { }
			}
			'no' { }
		)
		'has popup': stategroup @default: 'no' (
			'yes' {
				'popup': feature 'popup'
			}
			'no' { }
		)
	}

	'item options' component query {
		'has filters': stategroup @default: 'no' (
			'yes' {
				'filters': list non-empty {
					'label': text
					'type': stategroup (
						'number' {
							'number': query number requires filter binding { }
						}
						'text' {
							'text': query text requires filter binding { }
						}
						'stategroup' {
							'stategroup': query stategroup requires filter binding { }
						}
					)
				}
			}
			'no' { }
		)
		'has tooltip': stategroup @default: 'no' (
			'yes' {
				'label': feature 'query label'
			}
			'no' { }
		)
		'draggable': stategroup @default: 'no' (
			'yes' {
				'move': command binding {
					'start': number binding { }
					'can switch row': stategroup @default: 'no' (
						'yes' {
							'row': text binding { }
						}
						'no' { }
					)
					'can be dropped on item': stategroup @default: 'no' (
						'yes' {
							'item': text binding { }
						}
						'no' { }
					)
				}
				'has alternative move command': stategroup @default: 'no' (
					'yes' {
						'move': command binding {
							'start': number binding { }
							'can switch row': stategroup @default: 'no' (
								'yes' {
									'row': text binding { }
								}
								'no' { }
							)
							'can be dropped on item': stategroup @default: 'no' (
								'yes' {
									'item': text binding { }
								}
								'no' { }
							)
						}
					}
					'no' { }
				)
			}
			'no' { }
		)
		'has popup': stategroup @default: 'no' (
			'yes' {
				'popup': feature 'popup'
			}
			'no' { }
		)
		'has icon bar': stategroup @default: 'no' (
			'yes' {
				'stategroups': list non-empty {
					'stategroup': stategroup binding {
						'states': list {
							'state': state binding {
								'has tooltip': stategroup @default: 'no' (
									'yes' {
										'label': feature 'label'
									}
									'no' { }
								)
							}
						}
					}
				}
			}
			'no' { }
		)
	}

	'zoom level' component unbound {
		'name': text
		'days before today': number
		'days after today': number
		'tag interval': number
		'snap': stategroup (
			'none' { }
			'minute' {
				'minutes': number
			}
			'day' { }
			'week' { }
			'month' { }
			'year' { }
		)
		'width': number
		'date tags size': stategroup (
			'm' { }
			's' { }
			'xs' { }
		)
		'round off to day': stategroup (
			'yes' { }
			'no' { }
		)
	}

	'popup' component {
		'label': feature 'label'
		'node': feature 'node'
		'has open view button': stategroup (
			'yes' {
				'label': text
			}
			'no' { }
		)
	}

	'node' component {
		'entries': list non-empty {
			'type': stategroup (
				'number' {
					'number': number binding { }
				}
				'text' {
					'text': text binding { }
				}
				'stategroup' {
					'stategroup': stategroup binding {
						'states': list {
							'state': state binding {
								'has node': stategroup @default: 'no' (
									'yes' {
										'node': feature 'node'
									}
									'no' { }
								)
							}
						}
					}
				}
				'file' {
					'file': file binding { }
				}
				'command' {
					'command': command binding { }
				}
				'query' {
					'label': feature 'label'
					'query': query binding { }
				}
				// 'planning' {
				// 	'planning': feature 'planning'
				// }
				'chart' {
					'label': feature 'label'
					'type': stategroup (
						'range' {
							'range': feature 'range'
						}
						'pie chart' {
							'chart': feature 'pie chart'
						}
						'bar chart' {
							'chart': feature 'bar chart'
						}
						'line chart' {
							'chart': feature 'line chart'
						}
						'scatter chart' {
							'chart': feature 'scatter chart'
						}
						'radar chart' {
							'chart': feature 'radar chart'
						}
					)
				}
			)
		}
	}

collection-features

stategroup-features

number-features

text-features

file-features

global-features

node-features

collection-features

stategroup-features

number-features

text-features

file-features

global-features

node-features

collection-features

stategroup-features

number-features

text-features

file-features

'has global features': stategroup (
	'yes' {
		'configured features': dictionary { [ feature ]
			'has more features': stategroup = node-switch successor (
				| node = 'yes' { 'next feature' = successor }
				| none = 'no'
			)
			'feature': component 'feature'
		}
	}
	'no' { }
)

'handheld menu': stategroup (
	'yes' { [ handheld-menu (, ) ]
		'items': dictionary {
			'icon': [ icon: ] text
			'view': component 'handheld view selector'
			'has more items': stategroup = node-switch successor (
				| node = 'yes' { 'next item' = successor }
				| none = 'no'
			)
		}
	}
	'no' { }
)

'annotations': component 'extended annotations'

'singular path' {
	'has steps': stategroup (
		'yes' {
			'type': stategroup (
				'group' {
					'group': [ . ] reference
				}
			)
			'tail': component 'singular path'
		}
		'no' { }
	)
}

'conditional path' {
	'head': component 'singular path'
	'has steps': stategroup (
		'yes' {
			'type': stategroup (
				'state' {
					'state group': [ . ] reference
					'state': [ ? ] reference
				}
			)
			'tail': component 'conditional path'
		}
		'no' { }
	)
}

'collection path' {
	'head': component 'conditional path'
	'collection': [ ., [] ] reference
	'has more steps': stategroup (
		'yes' {
			'tail': component 'collection path'
		}
		'no' { }
	)
}

'query path' {
	'has steps': stategroup (
		'yes' {
			'type': stategroup (
				'parent' { [ ^ ] }
				'reference' {
					'reference': [ > ] reference
					'result': stategroup (
						'referenced node' { }
						'rule' {
							'rule': [ $ ] reference
						}
					)
				}
				'group' {
					'group': [ + ] reference
				}
				'state' {
					'state group': [ ? ] reference
					'state': [ | ] reference
				}
			)
			'tail': component 'query path'
		}
		'no' { }
	)
}

'extended annotations' { [ (, ) ]
	'node features': component 'features matrix'
	'has handheld frames': stategroup (
		'yes' {
			'handheld frames': dictionary { [ handheld: ]
				'frame': component 'handheld view frame'
			}
			'main frame': reference = first
		}
		'no' { }
	)
	'properties': dictionary {
		'type': [ : ] stategroup (
			'command' { [ command ]
				'annotations': component 'extended annotations'
			}
			'action' { [ action ]
				'annotations': component 'extended annotations'
			}
			'group' { [ group ]
				'annotations': component 'extended annotations'
			}
			'reference set' { [ reference-set ]
				'has custom queries': stategroup (
					'yes' {
						'custom queries': dictionary { [ query ]
							'has more queries': stategroup = node-switch successor (
								| node = 'yes' { 'next query' = successor }
								| none = 'no'
							)
							'query': component 'custom query'
						}
					}
					'no' { }
				)
			}
			'collection' { [ collection ]
				'entries are custom properties': stategroup (
					'yes' { [ @properties ]
						'type': stategroup (
							'value' {
								'value attribute': [ value: ] reference
							}
							'node' { [ node ] }
						)
					}
					'no' { }
				)
				'show as list': stategroup (
					'yes' { [ @list: ]
						'property': [ . ] reference
					}
					'no' { }
				)
				'has custom queries': stategroup (
					'yes' {
						'custom queries': dictionary { [ query ]
							'has more queries': stategroup = node-switch successor (
								| node = 'yes' { 'next query' = successor }
								| none = 'no'
							)
							'query': component 'custom query'
						}
					}
					'no' { }
				)
				'collection features': component 'features matrix'
				'sub tree': stategroup (
					'yes' {
						'annotations': component 'extended annotations'
					}
					'no' { }
				)
			}
			'stategroup' { [ stategroup ]
				'stategroup features': component 'features matrix'
				'states': [ (, ) ] dictionary { [ | ]
					'annotations': component 'extended annotations'
				}
			}
			'number' { [ number ]
				'number features': component 'features matrix'
			}
			'text' { [ text ]
				'text features': component 'features matrix'
			}
			'file' { [ file ]
				'file features': component 'features matrix'
			}
		)
	}
}

'features matrix' {
	'configured features': dictionary { [ feature ]
		'has more features': stategroup = node-switch successor (
			| node = 'yes' { 'next feature' = successor }
			| none = 'no'
		)
		'feature': component 'feature'
	}
}

'feature' {
	'properties': component 'feature properties'
}

'feature properties' {
	'properties': [ (, ) ] dictionary {
		'type': [ = ] stategroup (
			'binding' {
				'type': stategroup (
					'user' { [ user ] }
					'collection' { [ collection ]
						'path': component 'query path'
						'collection': [ . ] reference
					}
					'stategroup' { [ stategroup ]
						'path': component 'query path'
						'stategroup': [ . ] reference
					}
					'state' { [ state ]
						'state': reference
					}
					'number' { [ number ]
						'path': component 'query path'
						'number': [ . ] reference
					}
					'text' { [ text ]
						'path': component 'query path'
						'text': [ . ] reference
					}
					'file' { [ file ]
						'path': component 'query path'
						'file': [ . ] reference
					}
					'command' { [ command ]
						'path': component 'query path'
						'command': [ . ] reference
					}
					'action' { [ action ]
						'path': component 'query path'
						'action': [ . ] reference
					}
					'query' { [ query ]
						'path': component 'collection path'
						'query': component 'custom query'
					}
					'query property' { [ query property ]
						'property': reference
					}
					'query stategroup' { [ query stategroup ]
						'property': reference
					}
					'query number' { [ query number ]
						'property': reference
					}
					'query text' { [ query text ]
						'property': reference
					}
					'query file' { [ query file ]
						'property': reference
					}
				)
				'properties': component 'feature properties'
			}
			'configuration' {
				'type': stategroup (
					'list' {
						'properties': [ [, ] ] component 'feature properties list'
					}
					'stategroup' {
						'state': reference
						'properties': component 'feature properties'
					}
					'number' {
						'value': integer
					}
					'text' {
						'value': text
					}
				)
			}
			'feature' {
				'properties': component 'feature properties'
			}
		)
	}
}

'feature properties list' {
	'has entry': stategroup (
		'yes' {
			'entry': component 'feature properties'
			'tail': component 'feature properties list'
		}
		'no' { }
	)
}

'custom query' {
	'custom limit': stategroup (
		'yes' { [ limit: ]
			'sample': stategroup (
				'yes' {
					'sample size': integer
					'sample limit': [ /, / ] integer
				}
				'no' { }
			)
			'absolute limit': integer
		}
		'no' { }
	)
	'properties': [ [, ] ] dictionary {
		'has more properties': stategroup = node-switch successor (
			| node = 'yes' { 'next property' = successor }
			| none = 'no'
		)
		'context path': [ -> ] component 'query path'
		'type': [ : ] stategroup (
			'stategroup' { [ stategroup ]
				'property': reference
				'filter': stategroup (
					'yes' { [ filter ]
						'states': [ ? ] dictionary { [ | ]
							'is selected': stategroup (
								'yes' { [ selected ] }
								'no' { }
							)
						}
					}
					'simple' { [ filter simple ] }
					'no' { }
				)
			}
			'number' { [ number ]
				'property': reference
				'filter': stategroup (
					'yes' { [ filter ]
						'operator': stategroup (
							'smaller' { [ < ] }
							'smaller equal' { [ <= ] }
							'greater' { [ > ] }
							'greater equal' { [ >= ] }
							'equal' { [ == ] }
						)
						'criteria': stategroup (
							'now' { [ now ]
								'offset': [ + ] integer
							}
							'static' {
								'value': integer
							}
						)
					}
					'simple' { [ filter simple ] }
					'no' { }
				)
			}
			'text' { [ text ]
				'property': reference
				'filter': stategroup (
					'yes' { [ filter ]
						'criteria': text
					}
					'simple' { [ filter simple ] }
					'containment' { [ filter, selection ]
						'operator': stategroup (
							'in' { [ in ] }
							'not in' { [ not in ] }
						)
					}
					'no' { }
				)
			}
			'file' { [ file ]
				'property': reference
			}
			'action' { [ action ]
				'attribute': reference
			}
			'command' { [ command ]
				'attribute': reference
			}
		)
	}
	'custom sorting': stategroup (
		'yes' {
			'direction': stategroup (
				'ascending' { [ @ascending: ] }
				'descending' { [ @descending: ] }
			)
			'type': stategroup (
				'number' {
					'number': [ # ] reference
				}
				'text' {
					'text': [ . ] reference
				}
			)
		}
		'no' { }
	)
}

'annotated collection selector' {
	'has step': stategroup (
		'yes' {
			'property': [ . ] reference
			'type': stategroup (
				'group' { }
				'collection' { [ [] ] }
				'state' {
					'state': [ ? ] reference
				}
			)
			'tail': component 'annotated collection selector'
		}
		'no' {
			'property': [ ., [] ] reference
		}
	)
}

'handheld frame selector' {
	'type': stategroup (
		'inline' {
			'frame': component 'handheld view frame'
		}
		'annotated' {
			'frame': reference
		}
	)
}

'handheld view details' {
	'title': stategroup (
		'yes' {
			'property': [ title: ] component 'handheld view descriptor'
		}
		'no' { }
	)
	'fields': dictionary {
		'has more fields': stategroup = node-switch successor (
			| node = 'yes' { 'next field' = successor }
			| none = 'no'
		)
		'emphasis': [ : ] stategroup (
			'yes' { [ @emphasis ] }
			'no' { }
		)
		'property': component 'handheld view descriptor'
	}
}

'handheld view elements' {
	'has element': stategroup (
		'yes' {
			'type': [ -> ] stategroup (
				'label' { [ label: ]
					'text': reference
				}
				'inline view' { [ inline view: ]
					'frame': component 'handheld frame selector'
				}
				'view' {
					'view': component 'handheld view selector'
				}
			)
			'tail': component 'handheld view elements'
		}
		'no' { }
	)
}

'handheld view frame' {
	'type': stategroup (
		'decision' { [ (, ) ]
			'options': dictionary {
				'has more options': stategroup = node-switch successor (
					| node = 'yes' { 'next option' = successor }
					| none = 'no'
				)
				'emphasis': [ : ] stategroup (
					'low' { }
					'medium' { [ @emphasis: medium ] }
					'high' { [ @emphasis: high ] }
				)
				'frame': component 'handheld frame selector'
			}
		}
		'collection navigation' { [ collection (, ) ]
			'collection context': [ path: ] stategroup (
				'this' { }
				'root' { [ root ] }
			)
			'path': component 'annotated collection selector'
			'annotations': group {
				'header': stategroup (
					'yes' { }
					'no' { [ @no-header ] }
				)
				'layout': stategroup (
					'set' { [ @layout: ]
						'type': stategroup (
							'tabular' { [ tabular ] }
							'cards' { [ cards ] }
							'buttons' { [ buttons ] }
							'partition' { [ partition ]
								'path': [ on ] component 'query path'
								'property': [ . ] reference
								'type': stategroup (
									'simple' { }
									'year' { [ by, year ] }
									'month' { [ by, month ] }
									'week' { [ by, week ] }
									'day' { [ by, day ] }
									'hour' { [ by, hour ] }
								)
							}
						)
					}
					'default' { }
				)
			}
			'details': stategroup (
				'yes' {
					'details': component 'handheld view details'
				}
				'no' {
					'property': [ label: ] component 'handheld view descriptor'
				}
			)
			'filters': stategroup (
				'yes' { [ filters: ]
					'fields': dictionary {
						'has more fields': stategroup = node-switch successor (
							| node = 'yes' { 'next field' = successor }
							| none = 'no'
						)
						'path': [ : ] component 'query path'
						'property': [ . ] reference
						'type': stategroup (
							'stategroup' {
								'filter': stategroup (
									'state' {
										'state': [ is ] reference
									}
									'not state' {
										'state': [ is not ] reference
									}
									'states' {
										'states': [ is (, ) ] dictionary { }
									}
									'simple' { [ stategroup ] }
								)
							}
							'number' {
								'filter': stategroup (
									'match' {
										'operator': stategroup (
											'smaller' { [ smaller ] }
											'smaller equal' { [ smaller or equal ] }
											'greater' { [ greater ] }
											'greater equal' { [ greater or equal ] }
											'equal' { [ equal ] }
										)
										'type': [ than ] stategroup (
											'now' { [ now + ] }
											'static' { }
										)
										'offset': integer
									}
									'simple' { [ number ] }
								)
							}
							'text' {
								'filter': stategroup (
									'pattern' {
										'criteria': [ match ] text
									}
									'simple' { [ text ] }
									'current node' { [ this ] }
									'containment' { [ filter, selection ]
										'operator': stategroup (
											'in' { [ in ] }
											'not in' { [ not in ] }
										)
									}
								)
							}
						)
					}
				}
				'no' { }
			)
			'sort': stategroup (
				'yes' { [ sort: ]
					'path': component 'query path'
					'property': component 'handheld view property'
					'direction': stategroup (
						'ascending' { [ ascending ] }
						'descending' { [ descending ] }
					)
				}
				'no' { }
			)
			'action': stategroup (
				'yes' { [ view: ]
					'emphasis': stategroup (
						'low' { }
						'medium' { [ @emphasis: medium ] }
						'high' { [ @emphasis: high ] }
					)
					'view': component 'handheld view selector'
				}
				'no' { }
			)
		}
		'group navigation' {
			'property': [ . ] reference
			'frame': component 'handheld frame selector'
		}
		'state navigation' {
			'property': [ . ] reference
			'state': [ ? ] reference
			'frame': component 'handheld frame selector'
		}
		'reference navigation' {
			'text': [ > ] reference
			'frame': component 'handheld frame selector'
		}
		'pivot view' { [ pivot (, ) ]
			'options': group { dynamic-order
				'show crosshair': stategroup (
					'yes' { [ @crosshair ] }
					'no' { }
				)
				'show grid': stategroup (
					'yes' { [ @grid ] }
					'no' { }
				)
			}
			'columns': [ columns: . ] reference
			'column grouping': [ : ] reference
			'column label': [ label: ] component 'handheld view descriptor'
			'cells': [ cells: . ] reference
			'row grouping': [ : ] reference
			'row label': [ label: ] component 'handheld view descriptor'
			'content': stategroup (
				'inline view' { [ inline view: ]
					'frame': component 'handheld frame selector'
				}
				'label' { [ label: ]
					'property': component 'handheld view descriptor'
				}
			)
		}
		'detail view' { [ details (, ) ]
			'details': component 'handheld view details'
			'elements': component 'handheld view elements'
		}
		'command view' { [ command (, ) ]
			'details': component 'handheld view details'
			'selection': [ view: ] stategroup (
				'button' {
					'emphasis': stategroup (
						'low' { }
						'medium' { [ @emphasis: medium ] }
						'high' { [ @emphasis: high ] }
					)
				}
				'scan' { [ @scan (, ) ]
					'referencer': group {
						'path': component 'conditional path'
						'collection': [ ., [] ] reference
					}
					'path': [ using: ] component 'conditional path'
					'search property': [ . ] reference
				}
			)
			'view': component 'handheld view selector'
		}
	)
}

'handheld view descriptor' {
	'type': stategroup (
		'dynamic' {
			'property': component 'handheld view property selector'
		}
		'static text' {
			'text': reference
		}
		'icon' {
			'icon name': [ icon: ] text
		}
	)
	'has tail': stategroup (
		'yes' { [ , ]
			'tail': component 'handheld view descriptor'
		}
		'no' { }
	)
}

'handheld view property' {
	'property': [ . ] reference
	'style': stategroup (
		'default' { }
		'barcode' { [ @barcode: ]
			'barcode type': stategroup (
				'CODE128' { [ CODE128 ] }
				'CODE128A' { [ CODE128A ] }
				'CODE128B' { [ CODE128B ] }
				'CODE128C' { [ CODE128C ] }
				'EAN13' { [ EAN13 ] }
				'EAN8' { [ EAN8 ] }
				'EAN5' { [ EAN5 ] }
				'EAN2' { [ EAN2 ] }
				'UPCA' { [ UPCA ] }
				'UPCE' { [ UPCE ] }
				'CODE39' { [ CODE39 ] }
				'ITF' { [ ITF ] }
				'ITF14' { [ ITF14 ] }
				'MSI10' { [ MSI10 ] }
				'MSI11' { [ MSI11 ] }
				'MSI1010' { [ MSI1010 ] }
				'MSI1110' { [ MSI1110 ] }
				'Pharmacode' { [ Pharmacode ] }
				'Codabar' { [ Codabar ] }
			)
		}
		'qrcode' { [ @qrcode ] }
	)
}

'handheld view property selector' {
	'type': stategroup (
		'switch' {
			'stategroup': [ . ] reference
			'states': [ (, ) ] dictionary { [ | ]
				'tail': component 'handheld view property selector'
			}
		}
		'step' {
			'type': stategroup (
				'group' {
					'group': [ . ] reference
				}
				'state' {
					'stategroup': [ . ] reference
					'state': [ ? ] reference
				}
				'reference' {
					'text': [ > ] reference
				}
				'parent' { [ ^ ] }
			)
			'tail': component 'handheld view property selector'
		}
		'property' {
			'property': component 'handheld view property'
		}
	)
}

'handheld command annotations' { [ (, ) ]
	'properties': dictionary {
		'type': [ : ] stategroup (
			'group' { [ group ]
				'parameters': component 'handheld command annotations'
			}
			'collection' { [ collection ]
				'parameters': component 'handheld command annotations'
			}
			'stategroup' { [ stategroup (, ) ]
				'states': dictionary {
					'parameters': component 'handheld command annotations'
				}
			}
			'text' { [ text ]
				'style': stategroup (
					'buttons' { [ @button ] }
					'keyboard' { [ @keyboard ] }
					'default' { }
					'scan' { [ @scan using: ]
						'path': component 'conditional path'
						'search property': [ . ] reference
					}
				)
			}
		)
	}
}

'handheld view context' {
	'has step': stategroup (
		'yes' { [ ^ ]
			'tail': component 'handheld view context'
		}
		'no' { }
	)
}

'handheld view selector' {
	'type': stategroup (
		'switch' {
			'property': [ . ] reference
			'states': [ (, ) ] dictionary { [ | ]
				'tail': component 'handheld view selector'
			}
		}
		'step' {
			'type': stategroup (
				'group' {
					'property': [ . ] reference
				}
				'state' {
					'property': [ . ] reference
					'state': [ ? ] reference
				}
				'reference' {
					'text': [ > ] reference
				}
			)
			'tail': component 'handheld view selector'
		}
		'command' {
			'command': [ command: ] reference
			'annotations': group { dynamic-order
				'auto execute': stategroup (
					'yes' { [ @auto-execute ] }
					'no' { }
				)
				'close after execute': stategroup (
					'yes' { }
					'no' { [ @keep-open ] }
				)
				'emphasis': stategroup (
					'low' { }
					'medium' { [ @emphasis: medium ] }
					'high' { [ @emphasis: high ] }
				)
			}
			'parameter annotations': stategroup (
				'yes' {
					'parameters': component 'handheld command annotations'
				}
				'no' { }
			)
			'open view': stategroup (
				'yes' { [ and ]
					'context': component 'handheld view context'
					'frame': component 'handheld frame selector'
				}
				'no' { }
			)
			'has details': stategroup (
				'no' { }
				'yes' { [ details (, ) ]
					'details': component 'handheld view details'
					'elements': component 'handheld view elements'
				}
			)
		}
		'view' {
			'emphasis': [ : ] stategroup (
				'low' { }
				'medium' { [ @emphasis: medium ] }
				'high' { [ @emphasis: high ] }
			)
			'context': component 'handheld view context'
			'frame': component 'handheld frame selector'
			'title': stategroup (
				'custom' { [ title: ]
					'property': component 'handheld view descriptor'
				}
				'default' { }
			)
		}
	)
}