# Why ConLL is not in XML format

I am new to NLP, I found a format named ConLL which seems a tab-separated file, like

ID FORM LEMMA PLEMMA POS PPOS FEAT PFEAT HEAD PHEAD DEPREL PDEPREL


I found a dependency Treebank in this format for Persian. I would like to do some experiment on it. I am familiar with C# and C# has great libraries for XML document files.

I just wonder why such a corpus is not in XML format! I don't say a sophisticated one but they could put each line in a node of XML. Then at least, I would know what is the tag for each element.

However, I can convert it to XML.

A drawback of ConLL is that you have to put in fillers (e.g., 0) for sparse annotations.