[polari/wip/carlosg/tracker: 423/445] data: Add index on polari:time

[Carlos Garnacho <carlosg src gnome org>]

commit 4a9fc5bd2ca5db203d923c1dfba4b99bbf7a30d1
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Feb 24 22:32:47 2019 +0100

    data: Add index on polari:time
    
    Queries will typically order on it, so it makes sense to make it
    an indexed field.

 data/resources/polari.ontology | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/data/resources/polari.ontology b/data/resources/polari.ontology
index 810cc517..a5f142fb 100644
--- a/data/resources/polari.ontology
+++ b/data/resources/polari.ontology
@@ -76,7 +76,8 @@ polari:sender a rdf:Property ;
 polari:time a rdf:Property ;
             nrl:maxCardinality 1 ;
             rdfs:domain polari:Message ;
-            rdfs:range xsd:dateTime .
+            rdfs:range xsd:dateTime ;
+            tracker:indexed true .
 
 polari:text a rdf:Property ;
             nrl:maxCardinality 1 ;