New modder need help for modding

[JasKin]

I'm trying to create a new sculptures texture mod but I'm kinda new to this. Pls help, what does this error mean?

D:\Steam\steamapps\common\RimWorld\Mods\Rim34\Defs\ThingsDefs_Building/Building_Rim34.xml: unknown parse failure
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.LoadedModManager:CombineIntoUnifiedXML (System.Collections.Generic.List`1<Verse.LoadableXmlAsset>,System.Collections.Generic.Dictionary`2<System.Xml.XmlNode, Verse.LoadableXmlAsset>)
Verse.LoadedModManager:LoadAllActiveMods ()
Verse.PlayDataLoader:DoPlayLoad ()
Verse.PlayDataLoader:LoadAllPlayData (bool)
Verse.Root/<>c:<Start>b__6_1 ()
Verse.LongEventHandler:RunEventFromAnotherThread (System.Action)
Verse.LongEventHandler/<>c:<UpdateCurrentAsynchronousEvent>b__27_0 ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()

Here is the file I made, mostly copied and edited something from the game's core file 

Building_Rim34.xml