Attempt to resolve comments (#1056, $1058).

spec/ttml2.xml

@@ -37,6 +37,8 @@
 <!ENTITY prop "&#x221d;">
 <!ENTITY not "&#x00ac;">
 <!ENTITY deg "&#x00b0;">
+<!ENTITY lor "&#x2228;">
+<!ENTITY xor "&#x2295;">
 <!ENTITY ttml-ex1 SYSTEM "./examples/ex1.xml.esc">
 <!ENTITY ttml-ex1-x-0 SYSTEM "./examples/ex1-x-0.xml.esc">
 <!ENTITY ttml-ex1-p-0 SYSTEM "./examples/ex1-p-0.xml.esc">
@@ -1329,7 +1331,7 @@ abbreviated as <emph>ipd</emph> or <emph>IPD</emph>.</p>
 <def>
 <p>A <loc href="#terms-region">region</loc> that is defined in an inline manner with respect to some
 <loc href="#terms-content-element">content element</loc>  to be selected into (targeted to) the region.
-An inline region is specified either explicitly by a <loc href="#layout-vocabulary-region"><el>region</el></loc> element child of
+An inline region is specified by a <loc href="#layout-vocabulary-region"><el>region</el></loc> element child of
 certain <loc href="#terms-content-element">content elements</loc>.
 There is a one-to-one relation between an inline <loc href="#layout-vocabulary-region"><el>region</el></loc> element and its
 parent <loc href="#terms-content-element">content element</loc>. An inline region is assigned its parent element's time interval as its active
@@ -2099,6 +2101,9 @@ value syntax, no whitespace is permitted unless explicitly marked in a value syn
 <p>Unless stated to the contrary, the terms <emph>horizontal</emph> and <emph>vertical</emph> are interpreted in an absolute sense, not relative to writing mode, while
 <emph>width</emph> refers to a dimension along the <emph>horizontal</emph> axis and
 <emph>height</emph> refers to a dimension along the <emph>vertical</emph> axis. All exceptions are explicitly noted in the text.</p>
+<p>The phrase &quot;and (or)&quot; denotes a <emph>logical disjunction</emph> (<emph>p&lor;q</emph>), while the syntax
+&quot;either&hellip;or&hellip;&quot; denotes an <emph>exclusive disjunction</emph> (<emph>p&xor;q</emph>). Otherwise, the sense of &quot;or&quot; is
+implied by its context of use.</p>
 <p>All content of this specification that is not explicitly marked as
 non-normative is considered to be normative. If a section or appendix
 header contains the expression "Non-Normative", then the entirety
@@ -4195,10 +4200,10 @@ attribute must (1) adhere to the
 (2) express a feature designation as defined by
 <specref ref="feature-designations"/>.</p>
 <p>The <att>extends</att> attribute may be used to indicate that the feature being defined
-is, from either (or both) a syntactic or (and) semantic perspective, a proper superset of the
+is, from a syntactic and (or) semantic perspective, a proper superset of the
 feature referenced by the <att>extends</att> attribute.
 The <att>restricts</att> attribute may be used to indicate that the feature being defined
-is, from either (or both) a syntactic or (and) semantic perspective, a proper subset of the
+is, from a syntactic and (or) semantic perspective, a proper subset of the
 feature referenced by the <att>restricts</att> attribute.
 If an <att>extends</att> attribute is specified, then a <att>restricts</att> attribute must
 not be specified on a <el>ttp:feature</el> element; likewise, if a <att>restricts</att> attribute
@@ -4401,10 +4406,10 @@ attribute must (1) adhere to the
 (2) express a feature designation or extension designation as defined by
 <specref ref="feature-designations"/> or <specref ref="extension-designations"/>, respectively.</p>
 <p>The <att>extends</att> attribute may be used to indicate that the extension being defined
-is, from either (or both) a syntactic or (and) semantic perspective, a proper superset of the
+is, from a syntactic and (or) semantic perspective, a proper superset of the
 feature or extension referenced by the <att>extends</att> attribute.
 The <att>restricts</att> attribute may be used to indicate that the extension being defined
-is, from either (or both) a syntactic or (and) semantic perspective, a proper subset of the
+is, from a syntactic and (or) semantic perspective, a proper subset of the
 feature or extension referenced by the <att>restricts</att> attribute.
 If an <att>extends</att> attribute is specified, then a <att>restricts</att> attribute must
 not be specified on a <el>ttp:extension</el> element; likewise, if a <att>restricts</att> attribute
@@ -9790,7 +9795,7 @@ of a <loc href="#terms-content-region">content region</loc>;</p></item>
 of an image, overriding its intrinsic extent.</p></item>
 </olist>
 <note role="clarification">
-<p>If either (or both) border or (and) padding are applied to a region, then the region's extent includes that border and padding,
+<p>If a border and (or) padding are applied to a region, then the region's extent includes that border and padding,
 i.e., border and padding are both applied as insets, and, therefore, are interior to the extent of the region.</p>
 </note>
 <table id="style-property-details-extent" role="common">
@@ -12871,7 +12876,7 @@ shear angle, in order to fit the block area into the content rectangle of the im
 <p>The <att>tts:showBackground</att> attribute is used to specify
 constraints on when the background of a region is intended to be
 presented.</p>
-<note role="elaboration"><p>The background of a region includes marks produced by either (or both) (1) a background color or (2) a background image,
+<note role="elaboration"><p>The background of a region includes marks produced by (1) a background color and (or) (2) a background image,
 if either apply to the region.</p></note>
 <table id="style-property-details-showBackground" role="common">
 <col css="width: 25%;"/>