point – Project Haystack

def

point

Data point such as a sensor or actuator. See Points chapter.

meta

supertypes

marker

Marker labels a dict with typing information

    entity

Top-level dicts with a unique identifier

subtypes

cur-point

Point with support to report a "real-time" current value

his-point

Historized point with a history log of timestamp/value pairs

weather-point

Weather station observation point

writable-point

Point with writable output using 16-level priority array

tags

cur

Supports current value

dis

Display name for an entity

enum

Defines an eumeration of string key names

equipRef

Reference to equip which contains this entity

his

Supports historization of data

id

Defines the unique identifier of an entity in system using a ref value type

kind

Kind name used before Haystack 4.0 to identity data types

maxVal

Inclusive maximum for a numeric value

minVal

Inclusive minimum for a numeric value

siteRef

Reference to site which contains the entity

spaceRef

Reference to space which contains this entity

tz

Timezone identifier from standard timezone database

unit

Unit identifier from standard unit database

vfd

Variable-frequency drive

writable

Supports writing data