more info on glob and examples

Author: Fienne

src/faq.md

@@ -447,10 +447,13 @@ those Docker format containers using the Singularity engine. Directly
 specifying a Singularity format container is not part of the CWL standards.
 
 ## How outputBinding.glob works
-The `outputBinding` section describes how to set the value of each output parameter.  The `glob` field is used to return all files/pathnames that match a specific pattern. The value of the glob field is the `output directory`.
+The `outputBinding` section describes how to set the value of each output parameter.  The `glob` field is used to return all files/pathnames that match a specific pattern. The `glob` field specifies the file and the output directory in which the file should be stored. The value of the glob field is the `output directory`.  
+If the value of glob is a relative path pattern (one that does not start with a slash '/'), it is resolved relative to the output directory. If the glob value is an absolute path pattern (it starts with a slash '/'), it must refer to a path within the output directory.
 Glob's pattern rules abide to standard Unix path expansion rules. According to benchmarks, it is also expected to be faster than other methods for matching pathnames in directories.
 Wildcard characters can be used in the filenames when searching for files. The wildcard characters can either be an asterisk `*`, a question mark matching pathnames in directories. `?` or a range `[]`
 
+In the example below, the glob field is used to specify the file(`hello.txt`) in which the output should be stored.
+
 ```cwl
 outputs:
   example_out:
@@ -469,6 +472,24 @@ outputs:
       glob: '*.txt'
 ```
 
+Glob can also be used to return all outputs from a CommandLine Tool. For example
+
+```
+  outputs:
+  type: Directory
+  outputBinding: { glob: . }
+```
+
+OR
+
+```
+  outputs:
+  type:
+    type: array
+    items: [Directory, File]
+  outputBinding: {glob: "*"}
+```
+
 ## Debug JavaScript expressions
 
 You can use the <code>--js-console</code> option of <code>cwltool</code>, or you can try