EM Nodes: Stratigraphic Units, Activities and Paradata

▶ EM Nodes: Stratigraphic Units, Activities and Paradata (~~4 min)

Clip: 08 | Duration: ~4 min | Recording segment: ~38:00 → 42:48

Prerequisites

EM Language: Canvas, Metadata and Epochs

Overview

Stratigraphic node types (construction, destruction, use, etc.) represent individual actions. Activity nodes group multiple SUs into campaigns. Paradata nodes carry qualitative information (qualia) such as material, dimensions, and provenance, linked to centralised vocabulary lists.

Key Concepts

EM defines typed SU nodes: construction, destruction, use, transformation, etc.
Activity nodes cluster multiple SUs into broader operations or campaigns.
Paradata nodes carry qualia — material, dimensions, provenance, uncertainty level.
Node types are defined in a central JSON file, making the vocabulary extensible.

Screenshots

A paradata node with qualia subgraph open.

Qualia example: material = travertine, height = 4.2 m.

The centralised JSON file defining all node types and connectors.

Try It Yourself

In the playground EM, find a paradata node and list all qualia attached to it.

Note

A video walkthrough for this tutorial will be available on the Extended Matrix YouTube channel.