Google Now Reads within DWG Documents27 Sep, 2004
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.