diff --git a/content/2020-12/validation/const.markdown b/content/2020-12/validation/const.markdown
index 7b2d2ec8..fc93b54c 100644
--- a/content/2020-12/validation/const.markdown
+++ b/content/2020-12/validation/const.markdown
@@ -15,11 +15,15 @@ related:
keyword: type
---
-The `const` keyword in JSON Schema restricts a property value to a single, specific constant, applicable to any data type, including null. Its usage is functionally similar to an `enum` with a single value. Instances validate successfully only if their property value precisely matches the specified constant.
+The `const` keyword in restricts an instance to a specific value. Its usage is functionally similar to an `enum` with a single value. Instances validate successfully only if their property value deeply matches the specified constant.
* Applies to various JSON data types, including numbers, strings, booleans, objects, and arrays.
* Takes precedence over other validation keywords like `type` and `enum`.
+{{}}
+_**Note:** It is best practice to avoid using the `type` keyword or any other validation keyword with `const`, as `const` takes precedence over them. Therefore, it is better not to use them together._
+{{}}
+
## Examples
{{}}
@@ -55,11 +59,6 @@ The `const` keyword in JSON Schema restricts a property value to a single, speci
{{}}
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
- "type": "object",
- "properties": {
- "name": { "type": "string" },
- "age": { "type": "number" }
- },
"const": { "name": "John Doe", "age": 30 }
}
{{}}
diff --git a/content/2020-12/validation/pattern.markdown b/content/2020-12/validation/pattern.markdown
index 8def4bee..596fed7a 100644
--- a/content/2020-12/validation/pattern.markdown
+++ b/content/2020-12/validation/pattern.markdown
@@ -14,3 +14,102 @@ related:
- vocabulary: applicator
keyword: patternProperties
---
+
+The `pattern` keyword in JSON Schema is designed to define a regular expression pattern that a string value within an instance must adhere to. This regular expression is specified as a string for the `pattern` keyword. It functions as follows:
+
+* Assigns a regular expression (following [ECMA-262](https://www.ecma-international.org/publications-and-standards/standards/ecma-262/) dialect) to the `pattern` keyword to define the required format.
+* A string value is considered valid only if it successfully matches the specified pattern.
+* The regular expressions used with `pattern` are not implicitly anchored, requiring a complete match for validation. Partial matches are not accepted.
+
+## Examples
+
+{{}}
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "type": "string",
+ "pattern": "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$"
+}
+{{}}
+
+{{}}
+"john.doe@example.com"
+{{}}
+
+{{}}
+"invalid@yahoo"
+{{}}
+
+{{}}
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "type": "string",
+ "pattern": "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)[a-zA-Z\\d]{8,}$"
+}
+{{}}
+
+{{}}
+"MyStrongPass89"
+{{}}
+
+{{}}
+"password"
+{{}}
+
+{{}}
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "type": "string",
+ "pattern": "^[a-zA-Z0-9_]+$",
+ "minLength": 5,
+ "maxLength": 15
+}
+{{}}
+
+{{}}
+"foo_bar123"
+{{}}
+
+{{}}
+"invalid#username"
+{{}}
+
+{{}}
+"username_toolong123"
+{{}}
+- _This keyword can be combined with other string-related keywords, such as `maxLength` and `minLength`, for comprehensive validation._
+
+{{}}
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "type": "string",
+ "pattern": "apple"
+}
+{{}}
+
+{{}}
+"apple"
+{{}}
+
+{{}}
+"I love apples!"
+{{}}
+
+- _When defining regular expressions, it's crucial to note that a string is considered valid if the expression matches anywhere within it, as demonstrated in the above example._
+
+- _To avoid this and ensure that the entire string exactly matches the `pattern`, you would surround the regular expression with `^` and `$`. See the example below._
+
+{{}}
+{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "type": "string",
+ "pattern": "^apple$"
+}
+{{}}
+
+{{}}
+"apple"
+{{}}
+
+{{}}
+"I love apples!"
+{{}}