diff --git a/Block Records.go b/Block Records.go
index a921a07..fae2bac 100644
--- a/Block Records.go	
+++ b/Block Records.go	
@@ -9,8 +9,8 @@ File records:
 Offset  Size    Info
 0       32      Hash blake3 of the file content
 32      16      File ID
-48      1       File Type (low-level)
-49      2       File Format (high-level)
+48      1       File Type
+49      2       File Format
 51      8       File Size
 59      2       Count of Tags
 61      ?       Tags
@@ -54,8 +54,8 @@ const (
 type BlockRecordFile struct {
 	Hash        []byte               // Hash of the file data
 	ID          uuid.UUID            // ID
-	Type        uint8                // Type (low-level)
-	Format      uint16               // Format (high-level)
+	Type        uint8                // File Type
+	Format      uint16               // File Format
 	Size        uint64               // Size of the file data
 	TagsRaw     []BlockRecordFileTag // Tags to provide additional metadata
 	TagsDecoded []interface{}        // Decoded tags. See FileTagX structures.
diff --git a/File Formats.go b/File Formats.go
index c85933f..afabf9e 100644
--- a/File Formats.go	
+++ b/File Formats.go	
@@ -8,7 +8,7 @@ Definition of all recognized file formats. This file is likely being updated mor
 
 package core
 
-// Low-level content types of file data. This is a copy from Intelligence X.
+// General content types of data.
 const (
 	TypeBinary     = iota // Binary/unspecified
 	TypeText              // Plain text
@@ -20,9 +20,10 @@ const (
 	TypeContainer         // Container files like ZIP, RAR, TAR
 	TypeCompressed        // Compressed files like GZ, BZ
 	TypeFolder            // Virtual folder
+	TypeEbook             // Ebook
 )
 
-// High-level file types. New ones may be added as required.
+// File formats. New ones may be added to the list as required.
 const (
 	FormatBinary     = iota // Binary/unspecified
 	FormatPDF               // PDF document
diff --git a/webapi/Blockchain.go b/webapi/Blockchain.go
index 4e6753b..73bcc71 100644
--- a/webapi/Blockchain.go
+++ b/webapi/Blockchain.go
@@ -123,8 +123,8 @@ type apiFileTagRaw struct {
 type apiBlockRecordFile struct {
 	ID          uuid.UUID         `json:"id"`          // Unique ID.
 	Hash        []byte            `json:"hash"`        // Blake3 hash of the file data
-	Type        uint8             `json:"type"`        // Type (low-level)
-	Format      uint16            `json:"format"`      // Format (high-level)
+	Type        uint8             `json:"type"`        // File Type. For example audio or document. See TypeX.
+	Format      uint16            `json:"format"`      // File Format. This is more granular, for example PDF or Word file. See FormatX.
 	Size        uint64            `json:"size"`        // Size of the file
 	Folder      string            `json:"folder"`      // Folder, optional
 	Name        string            `json:"name"`        // Name of the file
diff --git a/webapi/readme.md b/webapi/readme.md
index 3990b25..0676e07 100644
--- a/webapi/readme.md
+++ b/webapi/readme.md
@@ -175,8 +175,8 @@ type apiBlockRecordProfileBlob struct {
 type apiBlockRecordFile struct {
 	ID          uuid.UUID         `json:"id"`          // Unique ID.
 	Hash        []byte            `json:"hash"`        // Blake3 hash of the file data
-	Type        uint8             `json:"type"`        // Type (low-level)
-	Format      uint16            `json:"format"`      // Format (high-level)
+	Type        uint8             `json:"type"`        // File Type. For example audio or document. See TypeX.
+	Format      uint16            `json:"format"`      // File Format. This is more granular, for example PDF or Word file. See FormatX.
 	Size        uint64            `json:"size"`        // Size of the file
 	Folder      string            `json:"folder"`      // Folder, optional
 	Name        string            `json:"name"`        // Name of the file