VKL: Under the Hood

In the previous lecture the co-builder edited the Knowledge Graph. But what did it actually touch? VKL is the Veezoo Knowledge Language, the text format the Knowledge Graph is written in, stored as version-controlled files.

This lecture looks under the hood: the four layers of Veezoo, the file tree in Studio with its knowledge-base and database layers, and the built-in version control that can roll back any change.

Key points

• VKL is the Veezoo Knowledge Language, the text format the Knowledge Graph is written in and kept in files.
• Four layers: chat, the Knowledge Graph, the Veezoo database layer that maps between them, and your data warehouse.
• The db layer holds one file per table, with each column, its database identifier, and its field type.
• The kb layer holds the classes with their properties, plus the entities synced from the data.
• The sql property in a class definition references columns from the db layer, and that link keeps the Knowledge Graph independent of the warehouse.
• A table file can become a virtual table with its own SQL, changing how Veezoo reads that table.
• Version control is built in: review past changes in detail and roll back to any point with one click.

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