Update caching.md

andreasprlic · andreasprlic · commit eacd1b1cf53a · 2013-09-18T22:56:08.000-07:00
diff --git a/structure/caching.md b/structure/caching.md
@@ -1,7 +1,7 @@
 Local PDB Installations
 =======================
 
-BioJava can automatically download and install most of the data files required. Those downloads 
+BioJava can automatically download and install most of the data files that it needs. Those downloads 
 will happen only once. Future requests for the data file will re-use the local copy.
 
 The main class that provides this functionality is the [AtomCache](http://www.biojava.org/docs/api/org/biojava/bio/structure/align/util/AtomCache.html).
@@ -39,3 +39,32 @@ An alternative is to hard-code the path in this way:
 			cache.setPath("/path/to/pdb/files/");
 </pre>
 
+## File Parsing Parameters
+
+The AtomCache also provides access to configuring various options that are available during the 
+parsing of files. The [FileParsingParameters](http://www.biojava.org/docs/api/org/biojava/bio/structure/io/FileParsingParameters.html)
+class is the main place to influence the level of detail and as a consequence the speed with which files can be loaded.
+
+This example turns on the use of chemical components when loading a structure. (See also the [next chapter](chemcomp.md))
+
+<pre>
+		AtomCache cache = new AtomCache();
+
+		cache.setPath("/tmp/");
+			
+		FileParsingParameters params = cache.getFileParsingParams();
+	
+		params.setLoadChemCompInfo(true);
+
+		StructureIO.setAtomCache(cache);
+
+		Structure structure = StructureIO.getStructure("4hhb");			
+
+</pre>
+
+
+
+
+
+
+
