Add README, modify example config, and small format change

config.json.example

@@ -57,6 +57,7 @@
             "iyp.crawlers.ihr.rov",
             "iyp.crawlers.bgptools.tags",
             "iyp.crawlers.bgptools.anycast_prefixes",
+            "iyp.crawlers.rovista.validating_rov",
             "iyp.crawlers.stanford.asdb",
             "iyp.crawlers.peeringdb.org",
             "iyp.crawlers.peeringdb.fac",

iyp/crawlers/rovista/README.md

@@ -0,0 +1,27 @@
+# RoVista -- https://rovista.netsecurelab.org/
+
+> RoVista aims to determine the Routing Origin Validation (ROV) status of network
+> operators.
+>
+> RoV Scores are determined based on the number of RPKI-invalid prefixes reachable by an
+> Autonomous System (AS). Consequently, a higher ROV score suggests that the AS can
+> effectively filter more RPKI-invalid prefixes. However, it is important to note that
+> the RoV score does not conclusively indicate whether an AS has actually implemented
+> ROV or not, partly due to limitations in [the] framework and other contributing
+> factors.
+
+IYP converts these scores (or ratios) to two Tags:
+
+- ASes with a ratio greater than 0.5 are categorized as `Validating RPKI ROV`
+- ASes with a ratio of less or equal 0.5 are categorized as `Not Validating RPKI ROV`
+
+## Graph representation
+
+```cypher
+(:AS {asn: 2497})-[:CATEGORIZED {ratio: 1.0}]->(:Tag {label: 'Validating RPKI ROV'})
+(:AS {asn: 6762})-[:CATEGORIZED {ratio: 0}]->(:Tag {label: 'Not Validating RPKI ROV'})
+```
+
+## Dependence
+
+This crawler is not depending on other crawlers.

iyp/crawlers/rovista/validating_rov.py

@@ -50,8 +50,8 @@ def run(self):
         for entry in entries:
             asn_qid = self.asn_id[entry['asn']]
             if entry['ratio'] > 0.5:
-                links.append({'src_id': asn_qid, 'dst_id': tag_id_valid, 'props': [
-                             self.reference, {'ratio': entry['ratio']}]})
+                links.append({'src_id': asn_qid, 'dst_id': tag_id_valid,
+                              'props': [self.reference, {'ratio': entry['ratio']}]})
             else:
                 links.append({'src_id': asn_qid, 'dst_id': tag_id_not_valid,
                              'props': [self.reference, {'ratio': entry['ratio']}]})