docs: Update type system examples. (#4041)

Type system schema changes required by #4017.

wiki/content/clients/index.md

@@ -319,23 +319,23 @@ op.Schema = `
 	dob: datetime .
 
 type Person {
-  name: string
-  age: int
-  dob: string
-  married: bool
-  raw: string
-  friends: [Person]
-  loc: [Loc]
-  school: [Institution]
+  name
+  age
+  dob
+  married
+  raw
+  friends
+  loc
+  school
  }
 
 type Loc {
-  type: string
-  coords: float
+  type
+  coords
  }
 
 type Institution {
-  name: string
+  name
  }
 
 `

wiki/content/get-started/index.md

@@ -215,11 +215,17 @@ curl -H "Content-Type: application/rdf" localhost:8080/mutate?commitNow=true -XP
 {
   set {
    _:luke <name> "Luke Skywalker" .
+   _:luke <dgraph.type> "Person" .
    _:leia <name> "Princess Leia" .
+   _:leia <dgraph.type> "Person" .
    _:han <name> "Han Solo" .
+   _:han <dgraph.type> "Person" .
    _:lucas <name> "George Lucas" .
+   _:lucas <dgraph.type> "Person" .
    _:irvin <name> "Irvin Kernshner" .
+   _:irvin <dgraph.type> "Person" .
    _:richard <name> "Richard Marquand" .
+   _:richard <dgraph.type> "Person" .
 
    _:sw1 <name> "Star Wars: Episode IV - A New Hope" .
    _:sw1 <release_date> "1977-05-25" .
@@ -229,6 +235,7 @@ curl -H "Content-Type: application/rdf" localhost:8080/mutate?commitNow=true -XP
    _:sw1 <starring> _:leia .
    _:sw1 <starring> _:han .
    _:sw1 <director> _:lucas .
+   _:sw1 <dgraph.type> "Film" .
 
    _:sw2 <name> "Star Wars: Episode V - The Empire Strikes Back" .
    _:sw2 <release_date> "1980-05-21" .
@@ -238,6 +245,7 @@ curl -H "Content-Type: application/rdf" localhost:8080/mutate?commitNow=true -XP
    _:sw2 <starring> _:leia .
    _:sw2 <starring> _:han .
    _:sw2 <director> _:irvin .
+   _:sw2 <dgraph.type> "Film" .
 
    _:sw3 <name> "Star Wars: Episode VI - Return of the Jedi" .
    _:sw3 <release_date> "1983-05-25" .
@@ -247,11 +255,13 @@ curl -H "Content-Type: application/rdf" localhost:8080/mutate?commitNow=true -XP
    _:sw3 <starring> _:leia .
    _:sw3 <starring> _:han .
    _:sw3 <director> _:richard .
+   _:sw3 <dgraph.type> "Film" .
 
    _:st1 <name> "Star Trek: The Motion Picture" .
    _:st1 <release_date> "1979-12-07" .
    _:st1 <revenue> "139000000" .
    _:st1 <running_time> "132" .
+   _:st1 <dgraph.type> "Film" .
   }
 }
 ' | python -m json.tool | less
@@ -270,6 +280,20 @@ curl localhost:8080/alter -XPOST -d $'
   release_date: datetime @index(year) .
   revenue: float .
   running_time: int .
+
+  type Person {
+    name
+  }
+
+  type Film {
+    name
+    release_date
+    revenue
+    running_time
+    starring
+    director
+  }
+
 ' | python -m json.tool | less
 ```
 

wiki/content/howto/index.md

@@ -776,8 +776,8 @@ To make it work again, add a type definition via the alter endpoint. Let’s ass
 
 ```text
 type Person {
-  name: string 
-  age: int
+  name
+  age
 }
 ```
 

wiki/content/query-language/index.md

@@ -1815,14 +1815,14 @@ the following definitions:
 
 ```
 type Animal {
-    name: string
-    species: uid
-    dob: datetime
+    name
+    species
+    dob
 }
 
 type Pet {
-    owner: uid
-    veterinarian: uid
+    owner
+    veterinarian
 }
 ```
 
@@ -2375,11 +2375,11 @@ Types are defined using a GraphQL-like syntax. For example:
 
 ```
 type Student {
-  name: string
-  dob: datetime
-  home_address: string
-  year: int
-  friends: [uid]
+  name
+  dob
+  home_address
+  year
+  friends
 }
 ```
 
@@ -2407,11 +2407,11 @@ different.
 
 ```
 type Student {
-  student_name: string
+  student_name
 }
 
 type Textbook {
-  textbook_name: string
+  textbook_name
 }
 
 student_name: string @index(exact) .