A tree representing a sentence contains all word-forms of the sentence including symbols of punctuation. Besides it contains only the root, whose attributes can take on the following values:
|form||#<serial number of the sentence in the framework of the file given in mstag|
|lemid||<identification of the sentence in the framework of ČNK>|
|mstag||<identification of the file for manual annotation at analytical level>|
|origf||#<serial number of the sentence in the file given in mstag|
|origap||space for annotator's notes|
The number of nodes of a sentence tree equals the number of word-forms at the morphological level (including punctuation marks) plus one. In manual annotation no node is allowed to be cancelled or added.