CastorDoc vs Spline

CastorDoc has no write-up on Specifiction yet; its figures are above.

Spline is a free, open-source tool for tracking data lineage and pipeline structure. Agents support Apache Spark and arbitrary functions written in Python 3.9 or newer, with a proof-of-concept adapter for OpenLineage metadata. They send metadata to the server through HTTP REST or Kafka, while the Consumer API exposes lineage to the web interface and third-party applications. Spline converts that information into graphs for visualization. The server stores lineage in ArangoDB, requiring version 3.11 or newer. Components are available as Docker containers and JAR or WAR artifacts, and the server can run in a standard Java environment. The project identifies regulatory documentation, business-logic records, and performance-bottleneck analysis as uses. By default, the Spark agent tracks persistent writes such as files, Hive tables, and databases. The Apache-2.0 project is hosted by AbsaOSS, with self-hosted components.