FaceFX fxa deserializing question

hi,I apologize for barging in. I've been physically and visually challenged for a while now, and to keep my mind occupied I do stuff in my limited able time.

In the past few days FaceFX came back on my radar, and I managed to write a script that deserializes the FXA format. In particular the phonemes mapping deserialization helped me with testing models from various AAA games. But I have a question about bones. While deserializing the data it gets to a point where it lists information about each bone, for example what node the bone is part of. And I can see 10 values, and 9 of them seem to be XYZ position/rotation/scale. But for the life of me I don't know what the remaining value is for.

would you mind telling me what other usage can floating-point values have in a 3-D world when they are not XYZ position/rotation/scale, my 3-D knowledge is limited, and due to health reasons I can't spend extensive time researching independently, and I can use a pointer in the right direction. Thanks and once again I apologize for any inconvenience!

Reverse engineering our software is in violation of our EULA and probably in violation of the EULA for whatever game you are using. Don't do it.

It is also going to be extremely difficult, and pointless since UE3 can read and write .fxa files and convert them into human-readable XML.