1 files changed, 6 insertions, 0 deletions
diff --git a/extractor/alignment.h b/extractor/alignment.h
index ef89dc0c..e9292121 100644
--- a/extractor/alignment.h
+++ b/extractor/alignment.h
@@ -11,12 +11,18 @@ using namespace std;
 
 namespace extractor {
 
+/**
+ * Data structure storing the word alignments for a parallel corpus.
+ */
 class Alignment {
  public:
+  // Reads alignment from text file.
   Alignment(const string& filename);
 
+  // Returns the alignment for a given sentence.
   virtual vector<pair<int, int> > GetLinks(int sentence_index) const;
 
+  // Writes alignment to file in binary format.
   void WriteBinary(const fs::path& filepath);
 
   virtual ~Alignment();