diff --git a/src/catar/encoder.rs b/src/catar/encoder.rs
index 969e9f27..940f5bd8 100644
--- a/src/catar/encoder.rs
+++ b/src/catar/encoder.rs
@@ -148,7 +148,7 @@ impl <'a, W: Write> CaTarEncoder<'a, W> {
 
 
         let entry = CaFormatEntry {
-            feature_flags: CA_FORMAT_FEATURE_FLAGS_MAX, // fixme: ??
+            feature_flags: CA_FORMAT_DEFAULT, // fixme: ??
             mode: mode,
             flags: 0,
             uid: stat.st_uid as u64,
diff --git a/src/catar/format_definition.rs b/src/catar/format_definition.rs
index c7889458..f9c82eeb 100644
--- a/src/catar/format_definition.rs
+++ b/src/catar/format_definition.rs
@@ -75,7 +75,65 @@ pub const CA_FORMAT_WITH_FLAG_NOCOMP: u64      = 0x1000000;
 /// Linux file attribute `PROJINHERIT`
 pub const CA_FORMAT_WITH_FLAG_PROJINHERIT: u64 = 0x2000000;
 
-pub const CA_FORMAT_FEATURE_FLAGS_MAX: u64 = 0xb000_0001_ffef_fe26; // fixme: ?
+
+// Include BTRFS subvolume flag
+pub const CA_FORMAT_WITH_SUBVOLUME: u64         = 0x4000000;
+// Include BTRFS read-only subvolume flag
+pub const CA_FORMAT_WITH_SUBVOLUME_RO: u64      = 0x8000000;
+
+/// Include Extended Attribute metadata */
+pub const CA_FORMAT_WITH_XATTRS: u64            = 0x10000000;
+/// Include Access Control List metadata
+pub const CA_FORMAT_WITH_ACL: u64               = 0x20000000;
+/// Include SELinux security context
+pub const CA_FORMAT_WITH_SELINUX: u64           = 0x40000000;
+/// Include "security.capability" xattr
+pub const CA_FORMAT_WITH_FCAPS: u64             = 0x80000000;
+
+/// XFS/ext4 project quota ID
+pub const CA_FORMAT_WITH_QUOTA_PROJID: u64      = 0x100000000;
+
+/// Support ".caexclude" files
+pub const CA_FORMAT_EXCLUDE_FILE: u64           = 0x1000000000000000;
+/// the purpose of this flag is still unclear
+pub const CA_FORMAT_SHA512_256: u64             = 0x2000000000000000;
+/// Exclude submounts
+pub const CA_FORMAT_EXCLUDE_SUBMOUNTS: u64      = 0x4000000000000000;
+/// Exclude entries with chattr flag NODUMP
+pub const CA_FORMAT_EXCLUDE_NODUMP: u64         = 0x8000000000000000;
+
+pub const CA_FORMAT_DEFAULT: u64 =
+CA_FORMAT_WITH_32BIT_UIDS |
+CA_FORMAT_WITH_USER_NAMES |
+CA_FORMAT_WITH_NSEC_TIME|
+CA_FORMAT_WITH_SYMLINKS|
+CA_FORMAT_WITH_DEVICE_NODES|
+CA_FORMAT_WITH_FIFOS|
+CA_FORMAT_WITH_SOCKETS|
+CA_FORMAT_WITH_FLAG_HIDDEN|
+CA_FORMAT_WITH_FLAG_SYSTEM|
+CA_FORMAT_WITH_FLAG_ARCHIVE|
+CA_FORMAT_WITH_FLAG_APPEND|
+CA_FORMAT_WITH_FLAG_NOATIME|
+CA_FORMAT_WITH_FLAG_COMPR|
+CA_FORMAT_WITH_FLAG_NOCOW|
+//CA_FORMAT_WITH_FLAG_NODUMP|
+CA_FORMAT_WITH_FLAG_DIRSYNC|
+CA_FORMAT_WITH_FLAG_IMMUTABLE|
+CA_FORMAT_WITH_FLAG_SYNC|
+CA_FORMAT_WITH_FLAG_NOCOMP|
+CA_FORMAT_WITH_FLAG_PROJINHERIT|
+CA_FORMAT_WITH_SUBVOLUME|
+CA_FORMAT_WITH_SUBVOLUME_RO|
+CA_FORMAT_WITH_XATTRS|
+CA_FORMAT_WITH_ACL|
+CA_FORMAT_WITH_SELINUX|
+CA_FORMAT_WITH_FCAPS|
+CA_FORMAT_WITH_QUOTA_PROJID |
+
+CA_FORMAT_EXCLUDE_NODUMP|
+CA_FORMAT_EXCLUDE_FILE|
+CA_FORMAT_SHA512_256;
 
 #[derive(Endian)]
 #[repr(C)]