Hi All I have a question about API. Particularly, about used terminology.
1. LeafReader. Why it starts with "Leaf"? Can I understand that, that such reader is intended for reading only one leaf of index tree? Does it mean that it is working inside a context (LeafReaderContext) of several documents "physically" located in that leaf? 2. Our LeafReader is positioned in some document, and reader.terms(field) will return terms list for the single field from the index. Right? 3. LeafReader is the successor of IndexReader, which has getTermVectors(int docID) Can I use it in my custom Query (to be aware of all documents fields) instead of terms(field) 4. I.e. LeafReader contains statistical methods, methods returning the document values, and the methods returning terms and postings. terms() and postings() are intended for search. 3. What is Postings/PostingEnum? Why is it named starting with "Posting"? My native language is Russian and I'm a bit confused trying to find a corresponding meaning of this word in a search context. 5. Ok, I see PostingEnum implements some basic interface DocIdSetIterator, but PostingEnum is one of approximately 20 implementations of that interface. Why is it used in LeafReader? What the principal difference between these 20 implementations and which of them can be really useful? Regards, Vadim Gindin
