# ORT Format File

This directory contains [the generated ts file](ort-generated.ts) necessary to support the ORT file format. The file is generated from [the ORT file format schema](https://github.com/microsoft/onnxruntime/blob/d42399e1b07ce61e95aae88bc6b6ea5dcaae2011/onnxruntime/core/flatbuffers/schema/ort.fbs). Please do not directly modify [the generated ts header file](ort-generated.ts).

[The ORT file format schema](https://github.com/microsoft/onnxruntime/blob/d42399e1b07ce61e95aae88bc6b6ea5dcaae2011/onnxruntime/core/flatbuffers/schema/ort.fbs) uses [FlatBuffers](https://github.com/google/flatbuffers) serialization library. To update [its generated ts file](ort-generated.ts),

1. Download or locate the [ort.fbs](https://github.com/microsoft/onnxruntime/blob/d42399e1b07ce61e95aae88bc6b6ea5dcaae2011/onnxruntime/core/flatbuffers/schema/ort.fbs) file.
2. Download FlatBuffers compiler: Download the latest flatc tool (flatc_windows.zip) from [Flatbuffers Release Page](https://github.com/google/flatbuffers/releases). Unzip and run

`> flatc_windows.exe --ts <path to ort.fbs>`

This should result in ort-generated.ts being updated.