diff --git a/docs/source/03_HED_formats.md b/docs/source/03_HED_formats.md
index ad3bde5..bc8600b 100644
--- a/docs/source/03_HED_formats.md
+++ b/docs/source/03_HED_formats.md
@@ -835,11 +835,11 @@ where `xxx` is the definition's name and `yyy` is a tag group containing
 the definitions contents.
 
 The two usages are equivalent, and tools should be able to transform between the two representations.
-Note, however, that transforming from a `Def` to a `Def-expand-group` requires the definition,
-while transforming from a `Def-expand-group` to `Def` form does not.
+Note, however, that transforming from a `Def` tag to a `Def-expand` group requires the definition,
+while transforming from a `Def-expand` group to `Def` tag does not.
 
 For definitions that include a placeholder, a value must be substituted for 
-the `#` placeholder in `Def` and `Def-expand-group` when final
+the `#` placeholder in `Def` tag and `Def-expand` group when final
 annotation assembly occurs. 
 
 See [**DEF_INVALID**](./Appendix_B.md#def_invalid) and
@@ -855,17 +855,17 @@ The `Onset` and `Offset` tags are used to represent the temporal extent
 of events that have non-zero duration.
 
 Each of these tags must appear in a top level tag group with a
-`Def` or `Def-expand-group` anchor.
+`Def` tag or `Def-expand` group anchor.
 
 A tag group with an `Onset` represents the start of an event that extends over time.
 A tag group with an `Offset` represents the end of an event that was previously initiated by an `Onset` group.
 A given event of temporal extent is also terminated by the appearance of another
-`Onset` group with the same `Def` or `Def-expand-group` anchor.
+`Onset` group with the same `Def` tag or `Def-expand` group anchor.
 
-The `Onset` tag group may only contain its `Def` or `Def-expand-group` anchor and
+The `Onset` tag group may only contain its `Def` tag or `Def-expand` group anchor and
 at most one additional inner tag group in addition to the `Onset` tag.
 
-The `Offset` tag group may only contain its `Def` or `Def-expand-group` anchor in
+The `Offset` tag group may only contain its `Def` tag or `Def-expand` group anchor in
 addition to the `Offset` tag.
 
 These requirements imply that `Onset` and `Offset` must be the only tags
diff --git a/docs/source/05_Advanced_annotation.md b/docs/source/05_Advanced_annotation.md
index 43e66aa..f255884 100644
--- a/docs/source/05_Advanced_annotation.md
+++ b/docs/source/05_Advanced_annotation.md
@@ -398,7 +398,7 @@ the same as the value used for its `Onset`.
 ``````
 
 
-### 5.3.2. Using `Duration`
+### 5.3.3. Using `Duration`
 
 The `Duration` tag is an alternative method for specifying an event with temporal scope. 
 The start of the temporal scope is the event in which the `Duration` tag appears. 
@@ -468,7 +468,7 @@ neural response, which is the case for many events involving visual or auditory
 The use of the `Duration` tag will not be fully supported by validators until HED
 standard schema version 8.2.0. 
 
-### 5.3.3. Using `Delay`
+### 5.3.4. Using `Delay`
 
 The `Delay` tag is grouped with an inner tag group to indicate that the associated tag-group is
 actually an implicit event that occurs at a time offset from the current event. 
diff --git a/docs/source/Appendix_B.md b/docs/source/Appendix_B.md
index 2a4aa27..850103c 100644
--- a/docs/source/Appendix_B.md
+++ b/docs/source/Appendix_B.md
@@ -119,15 +119,15 @@ different placeholder substitutions are considered to be different.
 
 **a.**  An `Onset` or `Offset` tag does not appear in a tag group.  
 **b.**  An `Onset` or `Offset` tag appears in a nested tag group (not a top-level tag group).   
-**c.**  An `Onset` or `Offset` tag is not grouped with exactly one `Def` tag or `Def-expand-group`.   
+**c.**  An `Onset` or `Offset` tag is not grouped with exactly one `Def` tag or `Def-expand` group.   
 **d.** An `Onset` group has more than one additional tag group.   
 **e.** An `Offset` appears with one or more tags or additional tag groups.   
 **f.**  An `Offset` tag appears before an `Onset` tag associated with the same definition.     
 **g.**  An `Offset` tag associated with a given definition appears after a previous `Offset` tag.
 without the appearance of an intervening `Onset` of the same name.   
-**h.**  An `Onset` tag group with has tags besides the anchor `Def` or `Def-expand-group`
+**h.**  An `Onset` tag group with has tags besides the anchor `Def` tag or `Def-expand` group
 that are not in a tag group.  
-**i.** An `Onset`, `Inset` or  `Offset` with a given `Def` or `Def-expand-group` anchor
+**i.** An `Onset`, `Inset` or  `Offset` with a given `Def` tag or `Def-expand` group anchor
 appears in an event marker with the same time as with another `Onset`, `Inset`, or `Offset`
 that uses the same anchor.  
 **j.** An `Inset` tag is not grouped with a `Def` or `Def-expand` of an ongoing `Onset`.