diff --git a/asterix-doc/src/site/markdown/aql/allens.md b/asterix-doc/src/site/markdown/aql/allens.md
index 97beee8..e4d83f0 100644
--- a/asterix-doc/src/site/markdown/aql/allens.md
+++ b/asterix-doc/src/site/markdown/aql/allens.md
@@ -4,7 +4,7 @@
 
 AsterixDB supports Allen's relations over interval types. Allen's relations are also called Allen's interval algebra. There are totally 13 base relations described by this algebra, and all of them are supported in AsterixDB (note that `interval-equals` is supported by the `=` comparison symbol so there is no extra function for it). 
 
-A detailed description of Allen's relations can be found from its [wikipedia entry](http://http://en.wikipedia.org/wiki/Allen's_interval_algebra). 
+A detailed description of Allen's relations can be found from its [wikipedia entry](http://en.wikipedia.org/wiki/Allen's_interval_algebra). 
 
 ## Allen's Relations Functions ##
 
@@ -20,7 +20,7 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-before(interval1, interval2)` is true if and only if `interval1.end < interval2.start`, and `interval-after(interval1, interval2)` is true if and only if `interval1.start > interval2.end`. If any of the two inputs is `null`, `null` is returned.
+    A `boolean` value. Specifically, `interval-before(interval1, interval2)` is true if and only if `interval1.end < interval2.start`, and `interval-after(interval1, interval2)` is true if and only if `interval1.start > interval2.end`. If any of the two inputs is `null`, `null` is returned.
 
  * Examples:
 
@@ -44,7 +44,7 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-meets(interval1, interval2)` is true if and only if `interval1.end = interval2.start`, and `interval-met-by(interval1, interval2)` is true if and only if `interval1.start = interval2.end`. If any of the two inputs is `null`, `null` is returned.
+    A `boolean` value. Specifically, `interval-meets(interval1, interval2)` is true if and only if `interval1.end = interval2.start`, and `interval-met-by(interval1, interval2)` is true if and only if `interval1.start = interval2.end`. If any of the two inputs is `null`, `null` is returned.
 
  * Examples:
 
@@ -72,20 +72,18 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-overlaps(interval1, interval2)` is true if and only if
+    A `boolean` value. Specifically, `interval-overlaps(interval1, interval2)` is true if and only if
 
         interval1.start < interval2.start
         AND interval2.end > interval1.end
         AND interval1.end > interval2.start
 
-
     `interval-overlapped-by(interval1, interval2)` is true if and only if
 
         interval2.start < interval1.start
         AND interval1.end > interval2.end
         AND interval2.end > interval1.start
 
-
     `interval-overlapping(interval1, interval2)` is trun if
 
         (interval2.start >= interval1.start
@@ -94,9 +92,9 @@
         (interval2.end > interval1.start
         AND interval2.end <= interval.end)
 
-     For all these functions, if any of the two inputs is `null`, `null` is returned.
+    For all these functions, if any of the two inputs is `null`, `null` is returned.
 
-     Note that `interval-overlaps` and `interval-overlapped-by` are following the Allen's relations on the definition of overlap. `interval-overlapping` is a syntax sugar for the case that the intersect of two intervals is not empty.
+    Note that `interval-overlaps` and `interval-overlapped-by` are following the Allen's relations on the definition of overlap. `interval-overlapping` is a syntax sugar for the case that the intersect of two intervals is not empty.
 
  * Examples:
 
@@ -123,18 +121,17 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-starts(interval1, interval2)` returns true if and only if
+    A `boolean` value. Specifically, `interval-starts(interval1, interval2)` returns true if and only if
 
         interval1.start = interval2.start
         AND interval1.end <= interval2.end
 
-
-     `interval-started-by(interval1, interval2)` returns true if and only if
+    `interval-started-by(interval1, interval2)` returns true if and only if
 
         interval1.start = interval2.start
         AND interval2.end <= interval1.end
 
-     For both functions, if any of the two inputs is `null`, `null` is returned.
+    For both functions, if any of the two inputs is `null`, `null` is returned.
 
  * Examples:
 
@@ -161,18 +158,17 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-covers(interval1, interval2)` is true if and only if
+    A `boolean` value. Specifically, `interval-covers(interval1, interval2)` is true if and only if
 
         interval1.start <= interval2.start
         AND interval2.end >= interval1.end
 
-
-     `interval-covered-by(interval1, interval2)` is true if and only if
+    `interval-covered-by(interval1, interval2)` is true if and only if
 
         interval2.start <= interval1.start
         AND interval1.end >= interval2.end
 
-     For both functions, if any of the two inputs is `null`, `null` is returned.
+    For both functions, if any of the two inputs is `null`, `null` is returned.
 
  * Examples:
 
@@ -199,7 +195,7 @@
     * `interval1`, `interval2`: two intervals to be compared
  * Return Value:
    
-   A `boolean` value. Specifically, `interval-ends(interval1, interval2)` returns true if and only if
+    A `boolean` value. Specifically, `interval-ends(interval1, interval2)` returns true if and only if
 
         interval1.end = interval2.end
         AND interval1.start >= interval2.start