The Sant Mat Lineages Chart is an effort to list various Inner Light and Sound resources. It is a continuation of the chart developed by Erika Molnar. her Yahoo ID was curious_yang. Her primary resource was David C. Lane's book and website.
While David Lane strives for technical accuracy in his lineage charts, I primarily use the publicly stated history of a group without confirming/denying/questioning the authenticity of it.
For data on recent changes to the chart, please see the ChangeLog.