root
    | [ _docuid      ]		{EStoreYes | EIndexUnTokenized}
    | [ _appclass    ]		{EStoreYes | EIndexTokenized}	
    | [ _appclass_ut ]		{EStoreNo  | EIndexUnTokenized}
    | [ _aggregate   ]      {EStoreNo  | EIndexUnTokenized} 	
    | [ _excerpt     ]		{EStoreYes | EIndexNo}
    | [ _mimetype (opt) ]	{EStoreYes | EIndexNo}
    |
    +-- msg
    | [ To     		]	{EStoreYes | EIndexTokenized}
    | [ From   		]	{EStoreYes | EIndexTokenized}
    | [ Body   		]	{EStoreYes | EIndexTokenized}
    | [ Folder 		]	{EStoreYes | EIndexNo}
    | [ Subject 	] 	{EStoreYes | EIndexTokenized}
    |
    |
    +-- file
    |     |
    | 		|
    |     +-- content
    |			|	[ Contents 	]			{EStoreYes | EIndexTokenized}
    |			| [ Name      ]     {EStoreNo  | EIndexTokenized}
    |			| [ BaseName  ]     {EStoreNo  | EIndexTokenized}
    |     | [ Extension ]     {EStoreNo  | EIndexTokenized}
    |			|
    |			+-- folder
    |			  [ Name  	  ]     {EStoreYes | EIndexTokenized}
    |			  [ Extension ]     {EStoreYes | EIndexUnTokenized}
    |
    |      
    +-- media
    |     | 
    |     |
    |     +-- audio
    |     | [ Name           ]	{EStoreYes | EIndexTokenized}
    |     | [ MediaId        ]	{EStoreYes | EIndexUnTokenized}
    |     | [ Title          ]  {EStoreYes | EIndexTokenized}
    |     | [ ItemType       ]  {EStoreYes | EIndexUnTokenized}
    |     | [ Extension      ]  {EStoreYes | EIndexTokenized}
    |     | [ Album          ]  {EStoreYes | EIndexTokenized}
    |	    | [ AlbumArtist    ]	{EStoreYes | EIndexTokenized}
    |     | [ OriginalArtist ]	{EStoreYes | EIndexTokenized}
    |     | [ Composer       ]	{EStoreYes | EIndexTokenized}
    |     | [ Artist         ]	{EStoreYes | EIndexTokenized}
    |     | 
    |     |
    |     +-- image
    |     | [ Name           ]	{EStoreYes | EIndexTokenized}
    |     | [ MediaId        ]	{EStoreYes | EIndexUnTokenized}
    |     | [ Title          ]  {EStoreYes | EIndexTokenized}
    |     | [ ItemType       ]  {EStoreYes | EIndexUnTokenized}
    |     | [ Extension      ]  {EStoreYes | EIndexTokenized}    
    |     | [ Comment        ]  {EStoreYes | EIndexTokenized}
    |     | [ DateTimeOrignal]	{EStoreYes | EIndexUnTokenized}
    |     |
    |     |    
    |     +-- video
    |	      [ Name           ]	{EStoreYes | EIndexTokenized}
    |       [ MediaId        ]	{EStoreYes | EIndexUnTokenized}
    |       [ Title          ]  {EStoreYes | EIndexTokenized}
    |       [ ItemType       ]  {EStoreYes | EIndexUnTokenized}
    |       [ Extension      ]  {EStoreYes | EIndexTokenized}
    |	      [ Artist         ]  {EStoreYes | EIndexTokenized}
    |       [ Author         ]	{EStoreYes | EIndexTokenized}
    |       [ Copyright      ]  {EStoreYes | EIndexTokenized}
    |       [ Description    ]	{EStoreYes | EIndexTokenized}
    |	      [ Comment        ]	{EStoreYes | EIndexTokenized}  
    |
    |
    +-- contact
    | [ GivenName   		]	{EStoreYes | EIndexTokenized}
    | [ FamilyName  		]	{EStoreYes | EIndexTokenized}	
    | [ CompanyName 		]	{EStoreYes | EIndexTokenized}
    | [ PhoneNumber 		]	{EStoreYes | EIndexTokenized}
    | [ Address     		]	{EStoreYes | EIndexTokenized}
    | [ Note        		]	{EStoreYes | EIndexTokenized}
    | [ JobTitle    		]	{EStoreYes | EIndexTokenized}
    | [ SecondName  		]	{EStoreYes | EIndexTokenized}
    | [ Suffix      		]	{EStoreYes | EIndexTokenized}
    | [ EMail       		]	{EStoreYes | EIndexTokenized}
    | [ URL         		]	{EStoreYes | EIndexTokenized}
    | [ PostOffice  		]	{EStoreYes | EIndexTokenized}
    | [ ExtendedAddress  	]	{EStoreYes | EIndexTokenized}
    | [ Locality  		]	{EStoreYes | EIndexTokenized}
    | [ Region  		]	{EStoreYes | EIndexTokenized}
    | [ PostCode  		]	{EStoreYes | EIndexTokenized}
    | [ Country  		]	{EStoreYes | EIndexTokenized}
    | [ SIPID  			]	{EStoreYes | EIndexTokenized}
    | [ Spouse  		]	{EStoreYes | EIndexTokenized}
    | [ Children  		]	{EStoreYes | EIndexTokenized}
    | [ Class  			]	{EStoreYes | EIndexTokenized}	
    | [ Prefix  		]	{EStoreYes | EIndexTokenized}
    | [ AdditionalName  	]	{EStoreYes | EIndexTokenized}
    | [ Fax  			]	{EStoreYes | EIndexTokenized}
    | [ GivenNamePronunciation 	]	{EStoreYes | EIndexTokenized}
    | [ FamilyNamePronunciation ]	{EStoreYes | EIndexTokenized}
    | [ CompanyNamePronunciation]	{EStoreYes | EIndexTokenized}
    |
    |
    +-- calendar
    | [ Summary     	]   	{EStoreYes | EIndexTokenized}
    | [ Description 	]	{EStoreYes | EIndexTokenized}
    | [ Location    	]	{EStoreYes | EIndexTokenized}
    | [ StartTime   	] (YYYYMMDDHHSS) (TimeZone UTC)	{EStoreYes | EIndexUnTokenized}
    | [ EndTime     	] (YYYYMMDDHHSS) (TimeZone UTC)	{EStoreYes | EIndexUnTokenized}
    | 
    |    
    +-- bookmark
    | [ Name       ] 		{EStoreYes | EIndexTokenized}
    | [ Url 	   ] 		{EStoreYes | EIndexTokenized} 
    |
    +-- applications
    | [ Name       ]       	{EStoreYes | EIndexTokenized}
    | [ Uid        ]       	{EStoreYes | EIndexTokenized}
    | [ Path       ]       	{EStoreYes | EIndexTokenized}
    |
    +-- notes
    | [ Date       ]  (YYYYMMDDHHSS)  {EStoreYes | EIndexUnTokenized}
    | [ Memo       ]       	{EStoreYes | EIndexTokenized}


For instance, a document for an email message should have the
appclass value defined as "root msg email" (with spaces in between the
words). SMS message would have it as "root msg phone sms".

If SMS, MMS and email messages originated from the same messenger
application and are indexed to the same indexed database, then the
appclass value given to the IdxDb retrieval call would be the common
denominator, which is "root msg", as well as the baseAppClass value
for creating the index would be the same, "root msg".

The field names are also put under the corresponding app classes. Some
field names are for system use, so they are defined on the root class,
prefixed with underscore to avoid name clashes. Application specific
harvesters should use names without underscore prefixes.

The exact hierarchy will undergo some obvious evolution, its structure
and the field names are up to the harvesters. However, the
preinstalled application suites should define a neatly structured
hieararchy facilitating flexible and sensible search narrowing and
widening.

NOTE: Later cpix library versions provide the feuture of searching any
field, one just have to use cpix_DEFAULT_FIELd field name (when
creating the cpix_QueryParser instance).