# work in progress

PREFIX bif: <http://www.openlinksw.com/schemas/bif#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX schema: <http://schema.org/>
PREFIX person: <https://iisg.amsterdam/links/person/>
PREFIX event: <https://iisg.amsterdam/links/event/>
PREFIX bio: <http://purl.org/vocab/bio/0.1/>
PREFIX iisgv: <https://iisg.amsterdam/links/vocab/>

SELECT ?person ?sex ?n_births ?first_b_date ?father_id ?mother_id  ?n_mar ?first_m_date 
(bif:datediff('year', xsd:date(str(?first_b_date)),xsd:date(str(?first_m_date))) AS ?age_at_mar )

    {

  SELECT ?person (count(distinct(?birth)) as ?n_births)   ?sex   ?father_id ?mother_id  
  (min(?b_date) as ?first_b_date)  (min(?m_date) as ?first_m_date) (count(distinct(?mar)) as ?n_mar)
 

WHERE {
  
  ?birth a bio:Birth .
  ?birth iisgv:newborn ?person .
  ?person schema:gender ?sex .
  ?birth bio:date ?b_date .
  ?birth iisgv:father ?father_id .
  ?birth iisgv:mother ?mother_id. 
  
  ?mar a bio:Marriage .
  ?mar iisgv:groom | iisgv:bride ?person .
  ?mar bio:date ?m_date .
  ?mar iisgv:fatherGroom | iisgv:fatherBride ?father_id2 . # optional property path to include both sexes
  ?mar iisgv:motherGroom | iisgv:motherBride ?mother_id2.  # could also opt for same _id as at birth, but then you lose the filter 																 option below
  
  FILTER(?father_id = ?father_id2) #link check, if id not same as birth, link = wrong or something else?
  FILTER(?mother_id = ?mother_id2)	
    
 
} }
ORDER BY ?person

#LIMIT 1000