Как прочитать текст со своей структурой из fbx

Есть файл fbx (ASCII). Хотел написать свой "читатель" (не знаю как это правильно назвать), но не знаю с чего начать.

Пример fbx:

FBXHeaderExtension:  {
    FBXHeaderVersion: 1003
    FBXVersion: 7500
    CreationTimeStamp:  {
        Version: 1000
        Year: 2017
        Month: 1
        Day: 20
        Hour: 21
        Minute: 55
        Second: 59
        Millisecond: 197
    }
    Creator: "FBX SDK/FBX Plugins version 2017.0.1"
    SceneInfo: "SceneInfo::GlobalInfo", "UserData" {
        Type: "UserData"
        Version: 100
        MetaData:  {
            Version: 100
            Title: ""
            Subject: ""
            Author: ""
            Keywords: ""
            Revision: ""
            Comment: ""
        }
        Properties70:  {
            P: "DocumentUrl", "KString", "Url", "", "C:\Users\...\Documents\3dsMax\export\Sphere.FBX"
            P: "SrcDocumentUrl", "KString", "Url", "", "C:\Users\...\Documents\3dsMax\export\Sphere.FBX"
            P: "Original", "Compound", "", ""
            P: "Original|ApplicationVendor", "KString", "", "", "Autodesk"
            P: "Original|ApplicationName", "KString", "", "", "3ds Max"
            P: "Original|ApplicationVersion", "KString", "", "", "2017"
            P: "Original|DateTime_GMT", "DateTime", "", "", "20/01/2017 15:55:59.197"
            P: "Original|FileName", "KString", "", "", "C:\Users\...\Documents\3dsMax\export\Sphere.FBX"
            P: "LastSaved", "Compound", "", ""
            P: "LastSaved|ApplicationVendor", "KString", "", "", "Autodesk"
            P: "LastSaved|ApplicationName", "KString", "", "", "3ds Max"
            P: "LastSaved|ApplicationVersion", "KString", "", "", "2017"
            P: "LastSaved|DateTime_GMT", "DateTime", "", "", "20/01/2017 15:55:59.197"
            P: "Original|ApplicationActiveProject", "KString", "", "", "C:\Users\...\Documents\3dsMax"
        }
    }
}