Google Now Reads within DWG Documents

The Google blog reports that in recent weeks, Google has begun to read within DWG documents. For instance, the blog reports, "If we try 'detail filetype:dwg,' we see that the search engine is able to extract information from this type of files." DWG format is not available as a choice in the Advanced Search file format box, so you need to type your search term followed by filetype:dwg, as in the blog example.
http://google-blog.dirson.com/post.new/0158/p>