You can search the Document List using some of the standard Google Data API query parameters. Categories are used to restrict the type of document (word processor document, spreadsheet) returned. The full-text query string is used to search the content of all the documents. More detailed information on parameters specific to the Documents List can be found in the Documents List Data API Reference Guide.
You can also request a feed containing all of your documents of a specific type. For example, to see a list of your work processing documents, you would perform a category query as follows.
<?php
$feed = $docs->getDocumentListFeed(
'http://docs.google.com/feeds/documents/private/full/-/document');
To request a list of your Google Spreadsheets, use the following category query:
<?php
$feed = $docs->getDocumentListFeed(
'http://docs.google.com/feeds/documents/private/full/-/spreadsheet');
You can search the content of documents by using a
Zend_Gdata_Docs_Query in your request. A Query object
can be used to construct the query URI, with the search term
being passed in as a parameter. Here is an example method which queries
the documents list for documents which contain the search string:
<?php
$docsQuery = new Zend_Gdata_Docs_Query();
$docsQuery->setQuery($query);
$feed = $client->getDocumentListFeed($docsQuery);