update docs

docs/create-simple-data-model.md → docs/create-data-model.md

@@ -1,4 +1,6 @@
-# Create a simple data model
+# Use `@themost/data` to create a data model
+
+`@themost/data` is a module that provides a simple way to create a data model schema. A data model schema is a set of rules that define the structure of a data model. It defines the fields of the data model, the type of each field, and other properties of the data model.
 
 This tutorial will show you how to create a simple data model schema.
 

docs/create-field.md

@@ -1,5 +1,5 @@
 
-# Create a simple field
+# Defining fields
 
 To create a simple field in your data model schema, you need to define the field's name, type, and any additional constraints or properties. Here is an example of how to define a simple field:
 
@@ -67,7 +67,7 @@ Here is an example of how to use different primitive types in your schema:
 }
 ```
 
-Read more about [primitive types](Primitive%20types.md).
+Read more about [primitive types](use-primitive-types.md).
 
 In this example:
 - `age` is defined as an integer.