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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-11791] bsonspec.org should clarify MinKey type code</title>
                <link>https://jira.mongodb.org/browse/DOCS-11791</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;The type code associated with a BSON element is a one-byte number which the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/f320f151e0a709dafc8f8359ab7fab303a7f74a9/src/mongo/bson/bson_validate.cpp#L209-L211&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB server&apos;s implementation interprets as a C++ signed char&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Whether or not the type code is a signed or unsigned char is usually not relevant, since all type codes except for MaxKey fall in the interval &lt;span class=&quot;error&quot;&gt;&amp;#91;0, 127&amp;#93;&lt;/span&gt;. However, the type code for MinKey is -1 (&lt;a href=&quot;https://docs.mongodb.com/manual/reference/bson-types/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;documented here&lt;/a&gt;). &lt;a href=&quot;http://bsonspec.org/spec.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://bsonspec.org/spec.html&lt;/a&gt; confusingly lists the MinKey type code as \xFF (the bit pattern 1111 1111) which would be 255 if interpreted as an unsigned char and -1 if interpreted as a twos complement signed char. This could lead a user to erroneously believe that {$type: 255} is a valid query, when in fact 255 is an invalid BSON type code.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://bsonspec.org/spec.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://bsonspec.org/spec.html&lt;/a&gt; should clarify that the type byte associated with a BSON element is a twos complement 8-bit signed number, and that the type code for MinKey is -1, not &quot;\0xFF&quot;.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;A%2FC&quot;&gt;&lt;/a&gt;A/C&lt;/h4&gt;
&lt;p&gt;&lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/error.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; As a user, I understand that the type byte associated with a BSON element is a twos complement 8-bit signed char&lt;/p&gt;

&lt;p&gt;&lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/error.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; As a user, i understand that the type code for minKey is -1&lt;/p&gt;</description>
                <environment></environment>
        <key id="557747">DOCS-11791</key>
            <summary>bsonspec.org should clarify MinKey type code</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="11050" iconUrl="https://jira.mongodb.org/images/icons/statuses/generic.png" description="">External Review</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="rea.rustagi@mongodb.com">Rea Rustagi</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                            <label>backlog</label>
                            <label>request</label>
                    </labels>
                <created>Mon, 11 Jun 2018 23:24:02 +0000</created>
                <updated>Thu, 1 Feb 2024 21:05:51 +0000</updated>
                                                                            <component>bsonspec</component>
                    <component>drivers</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="6060717" author="JIRAUSER1260679" created="Thu, 1 Feb 2024 21:05:51 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/bsonspec.org/pull/80&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/bsonspec.org/pull/80&lt;/a&gt;&lt;/p&gt;</comment>
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