diff --git a/data/file_features/published/3gp/female_amr67DTX_hinted.json b/data/file_features/published/3gp/female_amr67DTX_hinted.json
index 2e4144d..a9e7cc1 100644
--- a/data/file_features/published/3gp/female_amr67DTX_hinted.json
+++ b/data/file_features/published/3gp/female_amr67DTX_hinted.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "track reference",
-    "video track",
-    "audio track",
-    "sync table",
-    "RTP hint tracks"
-  ],
+  "features": ["video track", "audio track", "RTP hint tracks"],
   "notes": "",
   "license": "",
   "rel_filepath": "./female_amr67DTX_hinted.3gp",
diff --git a/data/file_features/published/3gp/female_amr67_hinted.json b/data/file_features/published/3gp/female_amr67_hinted.json
index 9792eb1..193b671 100644
--- a/data/file_features/published/3gp/female_amr67_hinted.json
+++ b/data/file_features/published/3gp/female_amr67_hinted.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "track reference",
-    "video track",
-    "audio track",
-    "sync table",
-    "RTP hint tracks"
-  ],
+  "features": ["video track", "audio track", "RTP hint tracks"],
   "notes": "",
   "license": "",
   "rel_filepath": "./female_amr67_hinted.3gp",
diff --git a/data/file_features/published/3gp/male_amr122.json b/data/file_features/published/3gp/male_amr122.json
index ed01e46..a22a359 100644
--- a/data/file_features/published/3gp/male_amr122.json
+++ b/data/file_features/published/3gp/male_amr122.json
@@ -5,15 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "track reference",
-    "video track",
-    "audio track",
-    "sync table"
-  ],
+  "features": ["video track", "audio track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./male_amr122.3gp",
diff --git a/data/file_features/published/3gp/male_amr122DTX.json b/data/file_features/published/3gp/male_amr122DTX.json
index cc9fc8d..107b395 100644
--- a/data/file_features/published/3gp/male_amr122DTX.json
+++ b/data/file_features/published/3gp/male_amr122DTX.json
@@ -5,15 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "track reference",
-    "video track",
-    "audio track",
-    "sync table"
-  ],
+  "features": ["video track", "audio track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./male_amr122DTX.3gp",
diff --git a/data/file_features/published/3gp/pdin_example.json b/data/file_features/published/3gp/pdin_example.json
index 821d96d..00e8576 100644
--- a/data/file_features/published/3gp/pdin_example.json
+++ b/data/file_features/published/3gp/pdin_example.json
@@ -5,17 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "video track",
-    "sync table",
-    "progressive dnload box",
-    "avc1 sample entry"
-  ],
+  "features": ["video track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./pdin_example.3gp",
diff --git a/data/file_features/published/3gp/rs_example_r1.json b/data/file_features/published/3gp/rs_example_r1.json
index f764553..b216b4b 100644
--- a/data/file_features/published/3gp/rs_example_r1.json
+++ b/data/file_features/published/3gp/rs_example_r1.json
@@ -6,20 +6,11 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "video track",
     "audio track",
-    "track selection box",
-    "sync table",
-    "sample groups",
     "rate share group",
     "Interleaved data",
-    "mp4a sample entry",
-    "avc1 sample entry"
+    "mp4a sample entry"
   ],
   "notes": "",
   "license": "",
diff --git a/data/file_features/published/isobmff/01_simple.json b/data/file_features/published/isobmff/01_simple.json
index aa83748..33d4104 100644
--- a/data/file_features/published/isobmff/01_simple.json
+++ b/data/file_features/published/isobmff/01_simple.json
@@ -6,18 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
     "audio track",
-    "ctts offsets",
-    "sync table",
-    "Copyright box",
     "Interleaved data",
     "Systems tracks etc.",
     "IOD box",
diff --git a/data/file_features/published/isobmff/02_dref_edts_img.json b/data/file_features/published/isobmff/02_dref_edts_img.json
index 0c64ab4..d51cf43 100644
--- a/data/file_features/published/isobmff/02_dref_edts_img.json
+++ b/data/file_features/published/isobmff/02_dref_edts_img.json
@@ -6,19 +6,10 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
-    "edit list",
     "audio track",
     "image track (no sync table)",
     "data ref to other file",
     "compact stz2",
-    "Copyright box",
     "Interleaved data",
     "Systems tracks etc.",
     "IOD box",
diff --git a/data/file_features/published/isobmff/03_hinted.json b/data/file_features/published/isobmff/03_hinted.json
index 4763760..45a60a6 100644
--- a/data/file_features/published/isobmff/03_hinted.json
+++ b/data/file_features/published/isobmff/03_hinted.json
@@ -6,21 +6,11 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
-    "Copyright box",
     "Interleaved data",
     "RTP hint tracks",
     "hint track setup",
-    "sdp boxes (moov and track)",
+    "sdp boxes",
     "hint stats boxes",
     "RTP immediate constructor",
     "RTP sample contructor with track reference",
diff --git a/data/file_features/published/isobmff/04_bifs_video.json b/data/file_features/published/isobmff/04_bifs_video.json
index c2dd81d..421e539 100644
--- a/data/file_features/published/isobmff/04_bifs_video.json
+++ b/data/file_features/published/isobmff/04_bifs_video.json
@@ -6,19 +6,9 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
     "data ref to other file",
     "compact stz2",
-    "ctts offsets",
-    "sync table",
-    "Copyright box",
     "Systems tracks etc.",
     "IOD box",
     "mp4v sample entry",
diff --git a/data/file_features/published/isobmff/05_bifs_video_protected_v2.json b/data/file_features/published/isobmff/05_bifs_video_protected_v2.json
index 9e1d97a..f13d35e 100644
--- a/data/file_features/published/isobmff/05_bifs_video_protected_v2.json
+++ b/data/file_features/published/isobmff/05_bifs_video_protected_v2.json
@@ -6,20 +6,10 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
-    "Protected streams (basic)",
-    "Copyright box",
+    "Protected basic",
     "file-level",
-    "item naming etc.",
+    "item naming",
     "Systems tracks etc.",
     "IOD box",
     "mp4v sample entry",
diff --git a/data/file_features/published/isobmff/06_bifs.json b/data/file_features/published/isobmff/06_bifs.json
index e30ae56..0f78388 100644
--- a/data/file_features/published/isobmff/06_bifs.json
+++ b/data/file_features/published/isobmff/06_bifs.json
@@ -6,14 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "late' order (mdat first)",
-    "track enabled bit",
-    "sync table",
-    "Copyright box",
+    "late order",
     "Systems tracks etc.",
     "IOD box",
     "mp4s sample entry",
diff --git a/data/file_features/published/isobmff/07_bifs_sprite.json b/data/file_features/published/isobmff/07_bifs_sprite.json
index c43784f..07bf9b4 100644
--- a/data/file_features/published/isobmff/07_bifs_sprite.json
+++ b/data/file_features/published/isobmff/07_bifs_sprite.json
@@ -6,16 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "late' order (mdat first)",
-    "track enabled bit",
-    "track reference",
-    "sync table",
+    "late order",
     "shadow sync",
-    "Copyright box",
     "Systems tracks etc.",
     "IOD box",
     "mp4s sample entry",
diff --git a/data/file_features/published/isobmff/08_bifs_carousel_v2.json b/data/file_features/published/isobmff/08_bifs_carousel_v2.json
index df4936b..320d990 100644
--- a/data/file_features/published/isobmff/08_bifs_carousel_v2.json
+++ b/data/file_features/published/isobmff/08_bifs_carousel_v2.json
@@ -6,14 +6,6 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "sync table",
-    "Copyright box",
     "sample dependency",
     "Systems tracks etc.",
     "IOD box",
diff --git a/data/file_features/published/isobmff/09_text.json b/data/file_features/published/isobmff/09_text.json
index 22a8115..b32d515 100644
--- a/data/file_features/published/isobmff/09_text.json
+++ b/data/file_features/published/isobmff/09_text.json
@@ -6,16 +6,9 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "unknown track type",
     "unknown codec type",
-    "Copyright box",
-    "several sample description"
+    "multiple sample descriptions"
   ],
   "notes": "",
   "license": "",
diff --git a/data/file_features/published/isobmff/10_fragments.json b/data/file_features/published/isobmff/10_fragments.json
index d7fcc64..6c94a32 100644
--- a/data/file_features/published/isobmff/10_fragments.json
+++ b/data/file_features/published/isobmff/10_fragments.json
@@ -6,18 +6,10 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "video track",
     "audio track",
-    "Copyright box",
     "Interleaved data",
-    "Two or more mdats",
-    "Movie fragment box",
+    "multiple mdats",
     "mov. Ext header"
   ],
   "notes": "",
diff --git a/data/file_features/published/isobmff/12_metas_v2.json b/data/file_features/published/isobmff/12_metas_v2.json
index 2926ef3..a611972 100644
--- a/data/file_features/published/isobmff/12_metas_v2.json
+++ b/data/file_features/published/isobmff/12_metas_v2.json
@@ -6,17 +6,12 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "image track (no sync table)",
     "file-level",
     "movie-level",
     "track-level",
     "data refs",
-    "item naming etc."
+    "item naming"
   ],
   "notes": "",
   "license": "",
diff --git a/data/file_features/published/isobmff/13_long.json b/data/file_features/published/isobmff/13_long.json
index 3959539..97ac1bc 100644
--- a/data/file_features/published/isobmff/13_long.json
+++ b/data/file_features/published/isobmff/13_long.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "64-bit mv/tr/md headers",
-    "track enabled bit",
-    "Copyright box"
-  ],
+  "features": ["64-bit mv/tr/md headers"],
   "notes": "",
   "license": "",
   "rel_filepath": "./13_long.mp4",
diff --git a/data/file_features/published/isobmff/14_large.json b/data/file_features/published/isobmff/14_large.json
index ede19be..1708d97 100644
--- a/data/file_features/published/isobmff/14_large.json
+++ b/data/file_features/published/isobmff/14_large.json
@@ -5,20 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "64-bit length",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "video track",
-    "64-bit chunks",
-    "ctts offsets",
-    "sync table",
-    "Copyright box"
-  ],
+  "features": ["64bit length", "video track", "64bit chunks"],
   "notes": {
     "compressed": true
   },
diff --git a/data/file_features/published/isobmff/a1-foreman-QCIF.json b/data/file_features/published/isobmff/a1-foreman-QCIF.json
index 430f082..99e1de2 100644
--- a/data/file_features/published/isobmff/a1-foreman-QCIF.json
+++ b/data/file_features/published/isobmff/a1-foreman-QCIF.json
@@ -6,12 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
     "video track",
     "audio track",
-    "sync table",
     "Interleaved data",
     "IOD box",
     "mp4a sample entry",
diff --git a/data/file_features/published/isobmff/a10-foreman_QCIF-raw.json b/data/file_features/published/isobmff/a10-foreman_QCIF-raw.json
index 680920b..a313be9 100644
--- a/data/file_features/published/isobmff/a10-foreman_QCIF-raw.json
+++ b/data/file_features/published/isobmff/a10-foreman_QCIF-raw.json
@@ -5,14 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "video track",
-    "unknown codec type"
-  ],
+  "features": ["video track", "unknown codec type"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a10-foreman_QCIF-raw.mp4",
diff --git a/data/file_features/published/isobmff/a2-foreman-QCIF-hinted.json b/data/file_features/published/isobmff/a2-foreman-QCIF-hinted.json
index 5b45f8f..32614b9 100644
--- a/data/file_features/published/isobmff/a2-foreman-QCIF-hinted.json
+++ b/data/file_features/published/isobmff/a2-foreman-QCIF-hinted.json
@@ -6,16 +6,11 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "track reference",
     "video track",
     "audio track",
-    "sync table",
     "RTP hint tracks",
     "hint track setup",
-    "sdp boxes (moov and track)",
+    "sdp boxes",
     "RTP immediate constructor",
     "RTP sample contructor with track reference",
     "IOD box",
diff --git a/data/file_features/published/isobmff/a3-tone-protected.json b/data/file_features/published/isobmff/a3-tone-protected.json
index 52686fa..4f8aeb2 100644
--- a/data/file_features/published/isobmff/a3-tone-protected.json
+++ b/data/file_features/published/isobmff/a3-tone-protected.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": ["./a3c-prot-keys.txt"],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "video track",
-    "audio track",
-    "sync table",
-    "Protected streams (basic)",
-    "IOD box"
-  ],
+  "features": ["video track", "audio track", "Protected basic", "IOD box"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a3-tone-protected.mp4",
diff --git a/data/file_features/published/isobmff/a3b-tone-deprot.json b/data/file_features/published/isobmff/a3b-tone-deprot.json
index 7898891..6bfe1a1 100644
--- a/data/file_features/published/isobmff/a3b-tone-deprot.json
+++ b/data/file_features/published/isobmff/a3b-tone-deprot.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "video track",
-    "audio track",
-    "sync table",
-    "Protected streams (basic)",
-    "IOD box"
-  ],
+  "features": ["video track", "audio track", "Protected basic", "IOD box"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a3b-tone-deprot.mp4",
diff --git a/data/file_features/published/isobmff/a4-tone-fragmented.json b/data/file_features/published/isobmff/a4-tone-fragmented.json
index 6cfb229..107b1c9 100644
--- a/data/file_features/published/isobmff/a4-tone-fragmented.json
+++ b/data/file_features/published/isobmff/a4-tone-fragmented.json
@@ -5,16 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "video track",
-    "audio track",
-    "sync table",
-    "Movie fragment box",
-    "IOD box"
-  ],
+  "features": ["video track", "audio track", "IOD box"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a4-tone-fragmented.mp4",
diff --git a/data/file_features/published/isobmff/a5-foreman-AVC.json b/data/file_features/published/isobmff/a5-foreman-AVC.json
index 76a43b1..d6e44f9 100644
--- a/data/file_features/published/isobmff/a5-foreman-AVC.json
+++ b/data/file_features/published/isobmff/a5-foreman-AVC.json
@@ -5,17 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "video track",
-    "audio track",
-    "ctts offsets",
-    "sync table",
-    "sample dependency",
-    "avc1 sample entry"
-  ],
+  "features": ["video track", "audio track", "sample dependency"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a5-foreman-AVC.mp4",
diff --git a/data/file_features/published/isobmff/a6_tone_multifile.json b/data/file_features/published/isobmff/a6_tone_multifile.json
index 4eaebc2..e28d992 100644
--- a/data/file_features/published/isobmff/a6_tone_multifile.json
+++ b/data/file_features/published/isobmff/a6_tone_multifile.json
@@ -5,15 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": ["./myData.dat"],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "video track",
-    "audio track",
-    "data ref to other file",
-    "sync table"
-  ],
+  "features": ["video track", "audio track", "data ref to other file"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a6_tone_multifile.mp4",
diff --git a/data/file_features/published/isobmff/a7-tone-oddities.json b/data/file_features/published/isobmff/a7-tone-oddities.json
index 2e72b98..68357cf 100644
--- a/data/file_features/published/isobmff/a7-tone-oddities.json
+++ b/data/file_features/published/isobmff/a7-tone-oddities.json
@@ -5,19 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "implied length (size=0)",
-    "FTYP box",
-    "UUID box",
-    "Free/skip",
-    "Unknown box",
-    "Movie box",
-    "track enabled bit",
-    "audio track",
-    "sync table",
-    "pad bits"
-  ],
+  "features": ["implied length", "unknown box", "audio track", "pad bits"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a7-tone-oddities.mp4",
diff --git a/data/file_features/published/isobmff/a8-foreman_QCIF_edit.json b/data/file_features/published/isobmff/a8-foreman_QCIF_edit.json
index 4ba6f7e..02c81b2 100644
--- a/data/file_features/published/isobmff/a8-foreman_QCIF_edit.json
+++ b/data/file_features/published/isobmff/a8-foreman_QCIF_edit.json
@@ -5,14 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "edit list",
-    "audio track",
-    "sync table"
-  ],
+  "features": ["audio track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a8-foreman_QCIF_edit.mp4",
diff --git a/data/file_features/published/isobmff/a9-aac-samplegroups-edit.json b/data/file_features/published/isobmff/a9-aac-samplegroups-edit.json
index 8480fcd..b20ac71 100644
--- a/data/file_features/published/isobmff/a9-aac-samplegroups-edit.json
+++ b/data/file_features/published/isobmff/a9-aac-samplegroups-edit.json
@@ -5,17 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "edit list",
-    "audio track",
-    "sync table",
-    "sample groups",
-    "pre-roll group",
-    "IOD box"
-  ],
+  "features": ["audio track", "pre-roll group", "IOD box"],
   "notes": "",
   "license": "",
   "rel_filepath": "./a9-aac-samplegroups-edit.mp4",
diff --git a/data/file_features/published/isobmff/compact-no-code-fec-1.json b/data/file_features/published/isobmff/compact-no-code-fec-1.json
index f81a2f5..706419d 100644
--- a/data/file_features/published/isobmff/compact-no-code-fec-1.json
+++ b/data/file_features/published/isobmff/compact-no-code-fec-1.json
@@ -5,14 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "file-level",
-    "item naming etc.",
-    "FD hint tracks"
-  ],
+  "features": ["file-level", "item naming etc.", "FD hint tracks"],
   "notes": "",
   "license": "",
   "rel_filepath": "./compact-no-code-fec-1.iso3",
diff --git a/data/file_features/published/isobmff/compact-no-code-fec-2.json b/data/file_features/published/isobmff/compact-no-code-fec-2.json
index 0401ad0..c5b4664 100644
--- a/data/file_features/published/isobmff/compact-no-code-fec-2.json
+++ b/data/file_features/published/isobmff/compact-no-code-fec-2.json
@@ -6,11 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
     "file-level",
-    "item naming etc.",
+    "item naming",
     "FD hint tracks",
     "FD session group box"
   ],
diff --git a/data/file_features/published/isobmff/f1.json b/data/file_features/published/isobmff/f1.json
index 993c3ae..7c745f8 100644
--- a/data/file_features/published/isobmff/f1.json
+++ b/data/file_features/published/isobmff/f1.json
@@ -6,16 +6,11 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
     "video track",
     "audio track",
     "Interleaved data",
     "IOD box",
-    "mp4a sample entry",
-    "avc1 sample entry"
+    "mp4a sample entry"
   ],
   "notes": "",
   "license": "",
diff --git a/data/file_features/published/isobmff/f2.json b/data/file_features/published/isobmff/f2.json
index e135799..35f462e 100644
--- a/data/file_features/published/isobmff/f2.json
+++ b/data/file_features/published/isobmff/f2.json
@@ -8,7 +8,7 @@
   "features": [
     "video track",
     "audio track",
-    "Protected streams (basic)",
+    "Protected basic",
     "Interleaved data",
     "IOD box"
   ],
diff --git a/data/file_features/published/isobmff/fragment-random-access-1+AF8-rev1.json b/data/file_features/published/isobmff/fragment-random-access-1+AF8-rev1.json
index b69c2d3..5881c84 100644
--- a/data/file_features/published/isobmff/fragment-random-access-1+AF8-rev1.json
+++ b/data/file_features/published/isobmff/fragment-random-access-1+AF8-rev1.json
@@ -6,14 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "video track",
     "audio track",
-    "sync table",
-    "Movie fragment box",
     "mov. Ext header",
     "fragment random access",
     "mp4a sample entry",
diff --git a/data/file_features/published/isobmff/fragment_random_access-2.json b/data/file_features/published/isobmff/fragment_random_access-2.json
index 75060be..83e4441 100644
--- a/data/file_features/published/isobmff/fragment_random_access-2.json
+++ b/data/file_features/published/isobmff/fragment_random_access-2.json
@@ -6,13 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
     "video track",
-    "ctts offsets",
-    "Movie fragment box",
     "mov. Ext header",
     "fragment random access",
     "mp4v sample entry"
diff --git a/data/file_features/published/isobmff/mbms-fec.json b/data/file_features/published/isobmff/mbms-fec.json
index a84afac..e5d6d89 100644
--- a/data/file_features/published/isobmff/mbms-fec.json
+++ b/data/file_features/published/isobmff/mbms-fec.json
@@ -6,11 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
     "file-level",
-    "item naming etc.",
+    "item naming",
     "FD hint tracks",
     "FEC reservoir",
     "FD session group box"
diff --git a/data/file_features/published/isobmff/restricted.json b/data/file_features/published/isobmff/restricted.json
index 738342c..276c54a 100644
--- a/data/file_features/published/isobmff/restricted.json
+++ b/data/file_features/published/isobmff/restricted.json
@@ -5,19 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "late' order (mdat first)",
-    "video track",
-    "track fragment decode time",
-    "sync table",
-    "Level assignment",
-    "Sub-tracks",
-    "Restricted sample entry"
-  ],
+  "features": ["late order", "video track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./restricted.mp4",
diff --git a/data/file_features/published/isobmff/rtp_rtcp_reception_hint_tracks_v2.json b/data/file_features/published/isobmff/rtp_rtcp_reception_hint_tracks_v2.json
index 92357e2..8306be9 100644
--- a/data/file_features/published/isobmff/rtp_rtcp_reception_hint_tracks_v2.json
+++ b/data/file_features/published/isobmff/rtp_rtcp_reception_hint_tracks_v2.json
@@ -9,7 +9,7 @@
     "video track",
     "audio track",
     "hint track setup",
-    "sdp boxes (moov and track)",
+    "sdp boxes",
     "hint stats boxes",
     "RTP sample contructor on self track",
     "RTP etc. reception hint track"
diff --git a/data/file_features/published/isobmff/sg-tl-st.json b/data/file_features/published/isobmff/sg-tl-st.json
index 16da78e..8080a23 100644
--- a/data/file_features/published/isobmff/sg-tl-st.json
+++ b/data/file_features/published/isobmff/sg-tl-st.json
@@ -6,20 +6,8 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Free/skip",
-    "Movie box",
-    "normal' order (moov-mdat)",
     "video track",
-    "track fragment decode time",
-    "sample groups",
     "Temporal level sample group",
-    "Level assignment",
-    "Sub-tracks",
-    "segment index box",
-    "sub-segment index box",
-    "avc1 sample entry",
     "layering and subseq grps"
   ],
   "notes": "",
diff --git a/data/file_features/published/isobmff/timed-metadata.json b/data/file_features/published/isobmff/timed-metadata.json
index fd37d13..a8c70c3 100644
--- a/data/file_features/published/isobmff/timed-metadata.json
+++ b/data/file_features/published/isobmff/timed-metadata.json
@@ -5,7 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": ["meta-data track"],
+  "features": ["metadata track"],
   "notes": "",
   "license": "",
   "rel_filepath": "./timed-metadata.mp4",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks.json b/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks.json
index 01cef0f..8a0dfa3 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks_empty_base.json b/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks_empty_base.json
index 4c81391..0f0696c 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks_empty_base.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_multiple_tracks_empty_base.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm.json b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm.json
index 2ebca4f..24d2bf7 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_all_intra.json b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_all_intra.json
index 227cfad..b510e55 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_all_intra.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_all_intra.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_rle.json b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_rle.json
index ded147a..1616d64 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_rle.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_nalm_rle.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_trif_full_picture.json b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_trif_full_picture.json
index 449004b..dfafd21 100644
--- a/data/file_features/published/nalu/hevc/hevc_tiles_single_track_trif_full_picture.json
+++ b/data/file_features/published/nalu/hevc/hevc_tiles_single_track_trif_full_picture.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "hev1 sample entry",
     "hvc1 sample entry",
     "hev2 sample entry",
diff --git a/data/file_features/published/nalu/hevc/subs_slice_hvc1.json b/data/file_features/published/nalu/hevc/subs_slice_hvc1.json
index af20cbf..07a3c79 100644
--- a/data/file_features/published/nalu/hevc/subs_slice_hvc1.json
+++ b/data/file_features/published/nalu/hevc/subs_slice_hvc1.json
@@ -5,7 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": ["sub-sample information"],
+  "features": [],
   "notes": "",
   "license": "",
   "rel_filepath": "./subs_slice_hvc1.mp4",
diff --git a/data/file_features/published/nalu/hevc/subs_tile_hvc1.json b/data/file_features/published/nalu/hevc/subs_tile_hvc1.json
index 4eb6321..ec4501e 100644
--- a/data/file_features/published/nalu/hevc/subs_tile_hvc1.json
+++ b/data/file_features/published/nalu/hevc/subs_tile_hvc1.json
@@ -5,7 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": ["sub-sample information"],
+  "features": [],
   "notes": "",
   "license": "",
   "rel_filepath": "./subs_tile_hvc1.mp4",
diff --git a/data/file_features/published/nalu/hevc/trgr_hvc1.json b/data/file_features/published/nalu/hevc/trgr_hvc1.json
index c833042..fc5b1d7 100644
--- a/data/file_features/published/nalu/hevc/trgr_hvc1.json
+++ b/data/file_features/published/nalu/hevc/trgr_hvc1.json
@@ -5,7 +5,7 @@
   "version": 1,
   "published": true,
   "associated_files": [],
-  "features": ["Track groups", "hvc1 sample entry"],
+  "features": [],
   "notes": "",
   "license": "",
   "rel_filepath": "./trgr_hvc1.mp4",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hev1_hev2_multiple_tracks_extractors.json b/data/file_features/published/nalu/l-hevc/mhvc_hev1_hev2_multiple_tracks_extractors.json
index 0c6278f..a11bbc4 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hev1_hev2_multiple_tracks_extractors.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hev1_hev2_multiple_tracks_extractors.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hev1_lhe1_multiple_tracks_implicit.json b/data/file_features/published/nalu/l-hevc/mhvc_hev1_lhe1_multiple_tracks_implicit.json
index 5ac2147..6cc4d8e 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hev1_lhe1_multiple_tracks_implicit.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hev1_lhe1_multiple_tracks_implicit.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hev1_single_track.json b/data/file_features/published/nalu/l-hevc/mhvc_hev1_single_track.json
index 92a37e9..8d587fc 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hev1_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hev1_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hev2_single_track.json b/data/file_features/published/nalu/l-hevc/mhvc_hev2_single_track.json
index 6d6ef03..40f170e 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hev2_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hev2_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_hvc2_multiple_tracks_extractors.json b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_hvc2_multiple_tracks_extractors.json
index becc243..f457126 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_hvc2_multiple_tracks_extractors.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_hvc2_multiple_tracks_extractors.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_lhv1_multiple_tracks_implicit.json b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_lhv1_multiple_tracks_implicit.json
index 62b4de5..5c4dd90 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_lhv1_multiple_tracks_implicit.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_lhv1_multiple_tracks_implicit.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_single_track.json b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_single_track.json
index 74d1b0a..61fe0f6 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hvc1_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hvc1_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/mhvc_hvc2_single_track.json b/data/file_features/published/nalu/l-hevc/mhvc_hvc2_single_track.json
index 48a1826..b8cfa9d 100644
--- a/data/file_features/published/nalu/l-hevc/mhvc_hvc2_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/mhvc_hvc2_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hev1_hev2_multiple_tracks_extractors.json b/data/file_features/published/nalu/l-hevc/shvc_hev1_hev2_multiple_tracks_extractors.json
index 9f30092..977b90e 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hev1_hev2_multiple_tracks_extractors.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hev1_hev2_multiple_tracks_extractors.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hev1_lhe1_multiple_tracks_implicit.json b/data/file_features/published/nalu/l-hevc/shvc_hev1_lhe1_multiple_tracks_implicit.json
index b76327a..0dee954 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hev1_lhe1_multiple_tracks_implicit.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hev1_lhe1_multiple_tracks_implicit.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hev1_single_track.json b/data/file_features/published/nalu/l-hevc/shvc_hev1_single_track.json
index e4003be..46d47c6 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hev1_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hev1_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hev2_single_track.json b/data/file_features/published/nalu/l-hevc/shvc_hev2_single_track.json
index 326dd84..489bc26 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hev2_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hev2_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hvc1_hvc2_multiple_tracks_extractors.json b/data/file_features/published/nalu/l-hevc/shvc_hvc1_hvc2_multiple_tracks_extractors.json
index dc3db42..b3de825 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hvc1_hvc2_multiple_tracks_extractors.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hvc1_hvc2_multiple_tracks_extractors.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hvc1_lhv1_multiple_tracks_implicit.json b/data/file_features/published/nalu/l-hevc/shvc_hvc1_lhv1_multiple_tracks_implicit.json
index 8476168..deb6cf3 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hvc1_lhv1_multiple_tracks_implicit.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hvc1_lhv1_multiple_tracks_implicit.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hvc1_single_track.json b/data/file_features/published/nalu/l-hevc/shvc_hvc1_single_track.json
index a8119b4..8b195a7 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hvc1_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hvc1_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/file_features/published/nalu/l-hevc/shvc_hvc2_single_track.json b/data/file_features/published/nalu/l-hevc/shvc_hvc2_single_track.json
index 0e49c46..7b1d35c 100644
--- a/data/file_features/published/nalu/l-hevc/shvc_hvc2_single_track.json
+++ b/data/file_features/published/nalu/l-hevc/shvc_hvc2_single_track.json
@@ -6,15 +6,7 @@
   "published": true,
   "associated_files": [],
   "features": [
-    "Ordinary box",
-    "FTYP box",
-    "Movie box",
-    "normal' order (moov-mdat)",
-    "track enabled bit",
-    "track reference",
     "video track",
-    "ctts offsets",
-    "sync table",
     "avc1 sample entry",
     "avc3 sample entry",
     "hev1 sample entry",
diff --git a/data/standard_features/14496-12/user_defined.json b/data/standard_features/14496-12/user_defined.json
index 3b05ed7..3141693 100644
--- a/data/standard_features/14496-12/user_defined.json
+++ b/data/standard_features/14496-12/user_defined.json
@@ -13,6 +13,8 @@
   "RTP hint tracks": "Regular RTP hint tracks are present. They should be ignored for local playback.",
   "implied length": "(size=0) Box with the length running to end of file (last box)",
   "unknown box": "A box with an 'unknown' code is present in the file and should be ignored. The box type used for testing could be one of 'junk', 'mess', etc.",
+  "unknown codec type": "",
+  "unknown track type": "",
   "late order": "(mdat first) The 'mdat' first and the 'moov' late, and boxes in the 'moov' in funny order.",
   "multiple mdats": "two or more mdat boxes are present",
   "multiple sample descriptions": "There is one track ujsing several sample entries, not just one",