diff --git a/README.md b/README.md
index a0498dd..32a113b 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 [![Build Status](https://travis-ci.org/dmfs/lib-recur.svg?branch=master)](https://travis-ci.org/dmfs/lib-recur)
 [![codecov](https://codecov.io/gh/dmfs/lib-recur/branch/master/graph/badge.svg)](https://codecov.io/gh/dmfs/lib-recur)
-[![Language grade: Java](https://img.shields.io/lgtm/grade/java/g/dmfs/lib-recur.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/dmfs/lib-recur/context:java)
 
 # lib-recur
 
@@ -127,7 +126,7 @@ new RecurrenceSet(DateTime.parse("19820523"),
 ```
 results in
 ```
-19830524,19840524,19850524…
+19820524,19830524,19840524,19850524…
 ```
 Note that `19820523` is not among the results.
 
@@ -142,7 +141,7 @@ new RecurrenceSet(DateTime.parse("19820523"),
 ```
 results in
 ```
-19820523,19830524,19840524,19850524…
+19820523,19820524,19830524,19840524,19850524…
 ```
 
 
@@ -167,27 +166,22 @@ This will always stop iterating after at most 1000 instances.
 By default, the parser is very tolerant and accepts all rules that comply with RFC 5545. You can use other modes to ensure a certain compliance level:
 
 		RecurrenceRule rule1 = new RecurrenceRule("FREQ=WEEKLY;BYWEEKNO=1,2,3,4;BYDAY=SU", RfcMode.RFC2445_STRICT);
-		// -> will iterate Sunday in the first four weeks of the year
-
+		// -> will throw an InvalidRecurrenceRuleExceptionException because in RFC 2445 BYWEEKNO is only valid in
+		// combination with YEARLY rules
 
 		RecurrenceRule rule2 = new RecurrenceRule("FREQ=WEEKLY;BYWEEKNO=1,2,3,4;BYDAY=SU", RfcMode.RFC2445_LAX);
-		// -> will iterate Sunday in the first four weeks of the year (just like RfcMode.RFC2445_STRICT)
-
+		// -> will iterate Sunday in the first four weeks of the year
 
 		RecurrenceRule rule3 = new RecurrenceRule("FREQ=WEEKLY;BYWEEKNO=1,2,3,4;BYDAY=SU", RfcMode.RFC5545_STRICT);
 		// -> will throw an InvalidRecurrenceRuleExceptionException because in RFC 5545 BYWEEKNO is only valid in
-		// combination to YEARLY rules
-
+		// combination with YEARLY rules
 
 		RecurrenceRule rule4 = new RecurrenceRule("FREQ=WEEKLY;BYWEEKNO=1,2,3,4;BYDAY=SU", RfcMode.RFC5545_LAX);
-		// -> will iterate every Sunday of the year
-		// since BYWEEKNO is not valid in WEEKLY rules this part is just dropped and the rule left is "FREQ=WEEKLY;BYDAY=SU"
-
+		// -> will iterate Sunday in the first four weeks of the year
 
 		RecurrenceRule rule5 = new RecurrenceRule("BYWEEKNO=1,2,3,4;BYDAY=SU;FREQ=WEEKLY", RfcMode.RFC2445_STRICT);
 		// -> will throw an InvalidRecurrenceRuleExceptionException because in RFC 2445 the rule must start with "FREQ="
 
-
 		RecurrenceRule rule6 = new RecurrenceRule("FREQ=MONTHLY;BYMONTH=4;", RfcMode.RFC2445_STRICT);
 		// -> will throw an InvalidRecurrenceRuleExceptionException because the trailing ";" is invalid
 
@@ -203,18 +197,18 @@ To build a rule you have to specify a base frequency and optionally an RfcMode.
 		rule.setCount(20);
 
 		// note that unlike with java.util.Calendar the months in this list are 1-based not 0-based
-		rule.setByRule(Parts.BYMONTH, 1, 3, 5, 7);
+		rule.setByRule(Part.BYMONTH, 1, 3, 5, 7);
 
-		rule.setByRule(Parts.BYMONTHDAY, 4, 8, 12);
+		rule.setByRule(Part.BYMONTHDAY, 4, 8, 12);
 
 		/*
 		 * Alternatively set the values from a list or an array:
 		 */ 
 		Integer[] dayArray = new Integer[]{4, 8, 12};
-		rule.setByRule(Parts.BYMONTHDAY, dayArray);
+		rule.setByRule(Part.BYMONTHDAY, dayArray);
 		
 		List<Integer> dayList = Arrays.asList(dayArray);
-		rule.setByRule(Parts.BYMONTHDAY, dayList);
+		rule.setByRule(Part.BYMONTHDAY, dayList);
 
 		String ruleStr = rule.toString(); 
 		// ruleStr is "FREQ=MONTHLY;BYMONTH=1,3,5,7;BYMONTHDAY=4,8,12;COUNT=20"