model.ossie.yaml

The semantic model, in Apache Ossie 0.2. tidepool also accepts the wrapped shape of Ossie 0.1.1 (semantic_model:). See the model for how the parts fit together.

Expressions are SQL. tidepool reads the OSSIE_SQL_2026 dialect, and ANSI_SQL when the expression has no OSSIE_SQL_2026 version.

The whole document.

key	type	default	description
ai_context	any
custom_extensions	list of CustomExtension
datasets	list of Dataset	required
description	string
metrics	list of Metric	[]
name	string	required
relationships	list of Relationship	[]
version	string	required

CustomExtension

key	type	default	description
data	string	required	A JSON document, as a string.
vendor_name	string	required

Dataset

key	type	default	description
ai_context	any
custom_extensions	list of CustomExtension
description	string
fields	list of Field	[]	Declared fields. Every column of the source table is also a field of the dataset under its own name; declaring one adds a label, a description, or a derived expression.
name	string	required
primary_key	list of string
source	string	required	In Tidepool: the name of a table in tables/.
unique_keys	list of list of string

Metric

key	type	default	description
ai_context	any
custom_extensions	list of CustomExtension
datatype	DataType
description	string
expression	Expression	required
name	string	required

Relationship

key	type	default	description
ai_context	any
custom_extensions	list of CustomExtension
from	string	required	The many side.
from_columns	list of string	required
name	string	required
to	string	required	The one side.
to_columns	list of string	required

Field

key	type	default	description
ai_context	any
custom_extensions	list of CustomExtension
datatype	DataType
description	string
dimension	Dimension
expression	Expression	required
label	string
name	string	required

DataType

Ossie's logical data types.

Type: String · Integer · Decimal · Float · Boolean · Date · Time · DateTime · DateTimeTz · Opaque.

Expression

key	type	default	description
dialects	list of DialectExpression	required

Dimension

key	type	default	description
is_time	boolean

DialectExpression

key	type	default	description
dialect	string	required	The dialect's name. Any string is kept; only [READ_DIALECTS] are read.
expression	string	required