XML terminology question

[General Tso]

Could somebody tell me if I'm using the proper terminology in the examples below.
Here is a section from Civ4UnitInfos.xml

<TerrainNatives>
____<TerrainNative>
________<TerrainType>TERRAIN_GRASS</TerrainType>
________<bTerrainNative>1</bTerrainNative>
____</TerrainNative>
____ <TerrainNative>
________<TerrainType>TERRAIN_PLAINS</TerrainType>
________<bTerrainNative>1</bTerrainNative>
____ </TerrainNative>
</TerrainNatives>

Would it be correct to call <TerrainType>TERRAIN_GRASS</TerrainType> and <bTerrainNative>1</bTerrainNative> "Data Elements"?

Would it be correct to call <TerrainNatives> a "Class Element", and then call <TerrainNative> a "Child Class Element"?
or
Would it be correct to call <TerrainNative> a "Class Element"? Then what would <TerrainNatives> be called?

Most people are probably not interested in this, but if anybody out there has some answers I'd be interested in hearing from them.