A Matrix Blob is a single zipped file, which contains a matrix file (matrix.xml) plus all supporting CAM files (Gerber, Drill, ODB++, DXF, etc.). The Matrix blob is primarily used to transfer everything required to complete a job, over the web in single contained file. This is primarily used to interact with PcbPreflight.com

Note: Matrix file MUST EXIST in the root folder of every Matrix Blob.
XML: matrix.xml
JSON: matrix.json
TEXT: matrix.fm6 Legacy support; All CAM files referenced in the matrix file must be relative to the root path.; Matrix Blob can have unlimted nested folders to store CAM files.

Example Matrix Blob Outline:
This sample Matrix blob outline demonstrates how files are placed. In the example the Matrix blob is being used to panelize 2 different PCB designs.

matrix.xml         <---Always located in root folder of the Matrix blob  (matrix.json or matrix.fm6)
- MyPCBDesign_1    <---- This folder contains all gerber and drill files for one PCB design
- MyPCBDesign_2    <---- This folder contains all gerber and drill files for another different PCB design