Added comments. Hooray!

1 files changed, 10 insertions, 0 deletions

diff --git a/extractor/phrase.h b/extractor/phrase.h
index 6521c438..a8e91e3c 100644
--- a/extractor/phrase.h
+++ b/extractor/phrase.h
@@ -11,20 +11,30 @@ using namespace std;
 
 namespace extractor {
 
+/**
+ * Structure containing the data for a phrase.
+ */
 class Phrase {
  public:
   friend Phrase PhraseBuilder::Build(const vector<int>& phrase);
 
+  // Returns the number of nonterminals in the phrase.
   int Arity() const;
 
+  // Returns the number of terminals (length) for the given chunk. (A chunk is a
+  // contiguous sequence of terminals in the phrase).
   int GetChunkLen(int index) const;
 
+  // Returns the symbols (word ids) marking up the phrase.
   vector<int> Get() const;
 
+  // Returns the symbol located at the given position in the phrase.
   int GetSymbol(int position) const;
 
+  // Returns the number of symbols in the phrase.
   int GetNumSymbols() const;
 
+  // Returns the words making up the phrase. (Nonterminals are stripped out.)
   vector<string> GetWords() const;
 
   bool operator<(const Phrase& other) const;