Hello! In 4.3.1 you can only read schema.xml or portions of it using Schema API (https://issues.apache.org/jira/browse/SOLR-4658). It is a start to allow schema.xml modifications using HTTP API, which will be a functionality of next release of Solr - https://issues.apache.org/jira/browse/SOLR-3251
-- Regards, Rafał Kuć Sematext :: http://sematext.com/ :: Solr - Lucene - ElasticSearch > Hi, > I am trying to figure out how to change the schema/config of an > existing core or a core to be created via http calls to solr. After > spending hours in searching online, I still could not find any > documents showing me how to do it. > The only way I know is that you have to log on to the solr host and > then create/modify the schema/config files on the host. It seem > surprising to me that we can create new core via the http interface > but are not able to change the schema/config in the same way. > Can anyone give me some hints? Thanks. > Regards, > James