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--- developer_guide:aiml_fundamentals:start [2016/11/07 13:00] – created borja
+++ developer_guide:aiml_fundamentals:start [2016/11/07 13:02] (current) – borja
@@ Line 24: / Line 24: @@
   * <think> : Used in AIML to store a variable without notifying the user.
   * <condition> : Similar to switch statements in programming language. It helps ALICE to respond to matching input.
+** AIML Vocabulary **
+AIML vocabulary uses words, space and two special characters * and _ as wild cards. AIML interpreter gives preference to pattern having _ than pattern having *. AIML tags are XML compliant and patterns are case-insensitive.
+Example
+<code>
+<aiml version = "1.0.1" encoding = "UTF-8"?>
+   <category>
+      <pattern> HELLO ALICE </pattern>
+      <template>
+         Hello User!
+      </template>
+   </category>
+</aiml>
+</code>
+Following are the important points to be considered −
+  * <aiml> tag signifies start of the AIML document.
+  * <category> tag defines the knowledge unit.
+  * <pattern> tag defines the pattern user is going to type.
+  * <template> tag defines the response to the user if user types Hello Alice.
+Result :
+<code>
+User: Hello Alice
+Bot: Hello User
+</code>