; Autor: moisés
; Fecha de creación: 27-12-00
; Fecha de la última modificación: 15-1-01
; Historia: 
;    2-1-01 Añado <inf_...> para cuando se quiera introducir datos
;    5-1-01 Añado preguntas
;    9-1-01 Añado <cont_...> para posibilitar preguntar por varios atributos
;    14-1-01 Añado atributos de contact
;    15-1-01 Estructuración y organización
;    20-1-01 Separación en ficheros

; Ejemplos de frases reconocidas:
;*******************************************************************************
; Do you know how many maps are there of Aragon ?
; I want maps of Aragon from 1/2/3 to 4/5/6  
; I want maps of politica from 1/2/3 to 4/5/6
; I want all maps of politica of Aragon from 1/2/3 to 4/5/6 
;    with the title "un titulo cualquiera"
; What are the titles of maps of Aragon ?
; I would like to get all titles of maps of Aragon
; The titles of maps of Aragon
; Can you show me any titles of maps of Aragon ?
; Can you say me where can I find maps of China 
; Can you display all maps of Aragon ?  (Se sustituye DISPLAY por SHOW con Wordnet)
; The maps of Aragon with coordinates north = 3 and south = 4 and east = 5 and west = 6
; The maps of Aragon with coordinate N = 3     (Se sustituye N por NORTH) 
; Where can I find maps of Aragon which supplier is DGA
; I want all maps which supplier is DGA and with the publication date 2001
; I am looking for if there are any maps of Aragon which supplier is DGA and with the 
;    publisher Edelvives
; I want all maps which provider is DGA   (Se sustituye PROVIDER por SUPPLIER) ???
; Do you know who is the supplier of the maps of Aragon
; Who is the publisher of maps which title is "hola coco"
; The titles of maps, the originator and the publisher of Aragon
; What is the geographic area, the time period and the bounding coordinates of the maps of Aragon   
; What are the bounding coordinates, the theme and who is the publisher of the maps of Aragon
; Show me the originator, the publisher and the title of all maps of Aragon which 
;    publication date is 1/2/3
; Who is the name of the organization that developed the maps of Canada ?
; What is the time period of all maps of India ?
; Who is the contact person and the organization of all maps of India ?
; I want the email, the address and the fax of contact of the maps with the title "syz"
;*******************************************************************************

<me_us> -> (me | us)
<ini_frase> -> (
   do you know | 
   I (am looking for | want | search | would like) ?(to get) | 
   ?((can | could) you) (show | search | say) ?<me_us>
)
<med_frase> -> (
   <pregunta_atributos>
)
<inf_frase> -> (
   <inf_atributos> ?(%qmark)
)
<frase> -> (
   ?<ini_frase> <med_frase> <inf_frase>
)
(<frase>) => (msg "ok")

<pregunta_atributos> -> (
   <pregunta_atributo> |
   <cont_pregunta_atributo> |
   (<pregunta_atributo> | <cont_pregunta_atributo>) (%comma | and) <pregunta_atributos>
)
<inf_atributos> -> (
   <inf_atributo> | <inf_atributo> ?and <inf_atributos>
) 
<pregunta_atributo> -> (
   <pregunta_title> | <pregunta_timePeriod> | <pregunta_originator> | 
   <pregunta_publisher> | <pregunta_contact> | <pregunta_person> | 
   <pregunta_organization> |
   (what | which) (<pregunta_place> | <pregunta_coordinates> |
                   <pregunta_publicationDate> | <pregunta_atributo1>)
)
<cont_pregunta_atributo> -> (
   <cont_pregunta_title> | <cont_pregunta_originator> | <cont_pregunta_publisher> |
   <cont_pregunta_publicationDate> | 
   <cont_pregunta_theme> | <cont_pregunta_person> | <cont_pregunta_organization> | 
   <cont_pregunta_atributo1>
)
<inf_atributo> -> (
   <inf_atributo1> | 
   <inf_place> | 
   <inf_theme> | 
   <inf_timePeriod> |
   <inf_coordinates> |
   <inf_publicationDate>
)
; atributos de información, datos que suministra el usuario según una determinada sintaxis
<atributo1_inf> -> (
   <atributos_inf_citation> |
   <atributos_inf_contact> |
   <atributos_inf_description> |
   <atributos_inf_geographicalCoordinates> |
   <atributos_inf_keywords> |
   <atributos_inf_status> |
   <atributos_inf_timePeriodOfContent>
) 
; atributos para preguntas que empiezan con "(what | which)"
<atributo1_pregunta> -> (   
   <atributos_pregunta_citation> |
   <atributos_pregunta_contact> |
   <atributos_pregunta_description> |
   <atributos_pregunta_geographicalCoordinates> |
   <atributos_pregunta_keywords> |
   <atributos_pregunta_status> |
   <atributos_pregunta_timePeriodOfContent>
)
<atributo> -> (<atributo_inf> | <atributo_pregunta>)
<fecha> -> (($n) %slash ($n) %slash ($n) | $n)
<literal> -> ((%apost | %dquote) (* $) (%apost | %dquote))
   

(salir) => 'exit