<issue>

Appears in

Frequency

<article-meta>

Zero or more times

<element-citation>

Zero or more times

Identifies the issue (or supplement to it), either as part of a volume or as a special issue

Examples:

Example of a issue number:

Refers to the issue: volume 56, número 4

...
<front>
    ...
    <article-meta>
        ...
        <volume>56</volume>
        <issue>4</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of supplement of number:

Refers to: volume 10, número 4, supplement

...
<front>
    ...
    <article-meta>
        ...
        <volume>10</volume>
        <issue>4 suppl</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of supplent of number:

Refers to the issue: volume 10, número 4, supplement 2

...
<front>
    ...
    <article-meta>
        ...
        <volume>10</volume>
        <issue>4 suppl 2</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of supplement of volume:

Refers to the issue: volume 54, supplement

...
<front>
    ...
    <article-meta>
        ...
        <volume>54</volume>
        <issue>suppl</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of supplement of volume:

Refers to the issue: volume 54, supplement 1

...
<front>
    ...
    <article-meta>
        ...
        <volume>54</volume>
        <issue>suppl 1</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of special number

Refers to the issue: volume 25, número especial

...
<front>
    ...
    <article-meta>
        ...
        <volume>25</volume>
        <issue>spe</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of special number

Refers to the issue: volume 25, número especial 2

...
<front>
    ...
    <article-meta>
        ...
        <volume>25</volume>
        <issue>spe2</issue>
        ...
    </article-meta>
    ...
</front>
...

Example of issue in <element-citation>:

Refers to an issue in a reference

...
<ref id="B01">
    ...
    <source>Journal Title</source>
    <volume>16</volume>
    <issue>3</issue>
    ...
</ref>
...