Sentence:  The necessity for <WSD>caveats</WSD> arise in two cases: one class of <WSD>caveats</WSD> is prohibitory as regards some contemplated dealing or transaction affecting the property described in the <WSD>caveat</WSD>; while another class of <WSD>caveats</WSD> arises out of adverse claims to the land itself, or to some estate or interest in the land. 
Meaning of the word marked with <WSD> tags:  A formal notice of interest in land under a Torrens land-title system.