ApiOmat uses a variety of datatypes, which can be selected when creating attributes. Most of the datatypes are mapped to the underlying JAVA datatypes and have a specific value range; the following table will explain the mappings and ranges.

Simple datatypes

ApiOmat Name	JAVA Mapping	value range / storage
String	`java.util.String`	maximum of 2 ³¹ - 1 chars
Double	`double`	double-precision 64-bit IEEE 754 floating point
Long	`long`	minimum value of -2 ⁶³ and a maximum value of 2 ⁶³ -1
Date	`java.util.Date`	stores dates in a `long` as milliseconds using 1970-01-01 as a reference
Location	`java.lang.Double[]`	array of `double` (latitude/longitude)

Complex types

ApiOmat Name	JAVA Type	notes
Map	`java.util.Map`	object that maps keys to values. A map cannot contain duplicate keys; each key can map to at most one value
File / Image	`java.io.InputStream`	Binary data stored in the underlying MongoDB and handled as InputStream in JAVA.

References

References refer to other existing classes. Their value range depends on the selected datatype.

Data types

Simple datatypes

Complex types

References

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