1     Definition 2     Functional Requirements 3     Syntax
4     Semantics 5    Conformance Testing 6     Performance Assessment

1      Definition

A Data Type including a collection of Basic Text Objects.

A Text Object can have a hierarchical structure where Text Objects contain Basic Text Objects and Text Objects.

2      Functional Requirements

A Text Object may include:

  1. ID of a Virtual Space (M-Instance) where it is or intended to be located.
  2. ID of the Text Object.
  3. Space-Time information of the Text Object.
  4. Basic Text Object and Text Objects included in the Text Objects.
  5. Annotation data set including:
    1. Annotations
    2. Space-Times of the Annotations.
    3. Rights to perform Actions on the Text Object.
  6. The Rights that may be exercised on the Text Object.

Note that.

  1. A Text Object that does not include Sub-Scenes and only one Basic Text Object is a Basic Text Object.
  2. The Space-Time information of a Basic Text Object and Text Object included in a Text Object may be superseded by the Space-Time information of the Text Object containing them.

3      Syntax

https://schemas.mpai.community/OSD/V1.3/data/TextObject.json

4      Semantics

Label Size Description
Header N1 Bytes Text Object Header
– Standard-TextObject 9 Bytes The characters “OSD-TXO-V”
– Version N2 Bytes Major version – 1 or 2 characters
– Dot-separator 1 Byte The character “.”
– Subversion N3 Bytes Minor version – 1 or 2 characters
MInstanceID N4 Bytes Identifier of M-Instance.
TextObjectID N5 Bytes Identifier of the Text Object.
TextObjectSpaceTime N6 Bytes Space-Time of Text Object.
BasicTextObjectCount N7 Bytes Set of Parent Text Objects.
BasicTextObjects[] N8 Bytes Set of Basic Text Objects.
– SpaceTime N9 Bytes Space Time of a Basic Text Object in the Text Object.
– BasicTextObject N10 Bytes A Basic Text Object in the Text Object.
TextObjectCount N11 Bytes Number of Text Objects.
TextObjects[] N12 Bytes Set of Text Objects.
– SpaceTime N13 Bytes Space Time of a Text Object in the Text Object.
– TextObject N14 Bytes A Text Object in the Text Object
Annotations[] N15 Bytes Set of Text Object Annotation.
– Annotation N16 Bytes An Annotation.
– AnnotationSpaceTime N17 Bytes Where Annotation is attached and when it will be active.
– Rights N18 Bytes Actions that may be performed on the Annotation
Rights N19 Bytes Actions that may be performed on the Object.
DescrMetadata N20 Bytes Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Text Object (OSD-TXO) V1.3 if:

  1. The Data validates against the Text Object’s JSON Schema.
  2. All Data in the Text Object’s JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers.

6     Performance Assessment