update datafusion and ballista links (#259)
diff --git a/README.md b/README.md
index 574b60b..21a625a 100644
--- a/README.md
+++ b/README.md
@@ -30,8 +30,8 @@
|Arrow | Core functionality (memory layout, arrays, low level computations) | [(README)](arrow/README.md) |
|Parquet | Parquet support | [(README)](parquet/README.md) |
|Arrow-flight | Arrow data between processes | [(README)](arrow-flight/README.md) |
-|DataFusion | In-memory query engine with SQL support | [(README)](datafusion/README.md) |
-|Ballista | Distributed query execution | [(README)](ballista/README.md) |
+|DataFusion | In-memory query engine with SQL support | [(README)](https://github.com/apache/arrow-datafusion/blob/master/README.md) |
+|Ballista | Distributed query execution | [(README)](https://github.com/apache/arrow-datafusion/blob/master/ballista/README.md) |
Independently, they support a vast array of functionality for in-memory computations.
@@ -53,7 +53,7 @@
## Arrow Rust Community
-We use the official [ASF Slack](https://s.apache.org/slack-invite) for informal discussions and coordination. This is
+We use the official [ASF Slack](https://s.apache.org/slack-invite) for informal discussions and coordination. This is
a great place to meet other contributors and get guidance on where to contribute. Join us in the `arrow-rust` channel.
We use [ASF JIRA](https://issues.apache.org/jira/secure/Dashboard.jspa) as the system of record for new features
@@ -62,7 +62,7 @@
For design discussions we generally collaborate on Google documents and file a JIRA linking to the document.
There is also a bi-weekly Rust-specific sync call for the Arrow Rust community. This is hosted on Google Meet
-at https://meet.google.com/ctp-yujs-aee on alternate Wednesday's at 09:00 US/Pacific, 12:00 US/Eastern. During
+at https://meet.google.com/ctp-yujs-aee on alternate Wednesday's at 09:00 US/Pacific, 12:00 US/Eastern. During
US daylight savings time this corresponds to 16:00 UTC and at other times this is 17:00 UTC.
## Developer's guide to Arrow Rust
