[GENERAL] insert - on conflict question - Mailing list pgsql-general

How do I formulate the on conflict  do update-section of this query? When I try set title=q.title, q is unknown.  When I try and change 'title' in the select-part to something else and try title=ti I get the message that ti cannot be used in this part of the query.

INSERT INTO wos_2017_1.article (ut,   title,   author_count)
WITH p AS (   SELECT       ARRAY [ ARRAY [ 't', 'some_namespace' ] ] AS ns),
q AS (   SELECT       ut,       unnest (xpath ('//t:title[@type= "item"]/text()',               xml,               p.ns))::text title,       unnest (xpath ('//t:summary/t:names/@count',               xml,               p.ns))::TEXT::INTEGER AS author_count   FROM       p,       source.cover_2016)
SELECT   ut,   regexp_replace (regexp_replace (regexp_replace (title, '<', '<', 'g'), '&', '&', 'g'), '>', '>', 'g')   title,   author_count
FROM   q 

ON CONFLICT (ut)   DO UPDATE
SET   title = title,   author_count = author_count;