From cff2ccabf1328108aeead1fef67131377dd02194 Mon Sep 17 00:00:00 2001
From: Paul Baltescu <pauldb89@gmail.com>
Date: Sat, 30 Nov 2013 00:49:20 +0000
Subject: Update extractor README.

---
 extractor/README.md | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'extractor')

diff --git a/extractor/README.md b/extractor/README.md
index c9db8de8..642fbd1d 100644
--- a/extractor/README.md
+++ b/extractor/README.md
@@ -1,8 +1,14 @@
 C++ implementation of the online grammar extractor originally developed by [Adam Lopez](http://www.cs.jhu.edu/~alopez/).
 
-To run the extractor you need to:
+The grammar extraction takes place in two steps: (a) precomputing a number of data structures and (b) actually extracting the grammars. All the flags below have the same meaning as in the cython implementation.
 
-    cdec/extractor/run_extractor -t <num_threads> -a <alignment> -b <parallel_corpus> -g <grammar_output_path> < <input_sentences> > <sgm_file>
+To compile the data structures you need to run:
+
+    cdec/extractor/compile -a <alignment> -b <parallel_corpus> -c <compile_config_file> -o <compile_directory>
+
+To extract the grammars you need to run:
+
+    cdec/extract/extract -t <num_threads> -c <compile_config_file> -g <grammar_output_path> < <input_sentencs> > <sgm_file>
 
 To run unit tests you need first to configure `cdec` with the [Google Test](https://code.google.com/p/googletest/) and [Google Mock](https://code.google.com/p/googlemock/) libraries:
 
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