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Template:COinS safe
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This template is safe for use in citation templates that produce COinS metadata; see COinS in Wikipedia. If HTML or other markup is added, then the template must be reevaluated. | 
Usage
This template is a notice for templates that may be used in citation templates. By default, it indicates the template is safe for use as shown above.
To indicate a template that should not be used in a citation template:
{{COinS safe|n}}
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This template should not be used in citation templates that produce COinS metadata; see COinS in Wikipedia. It includes markup that will pollute the metadata. | 
Issue
Citation templates such as Citation Style 1 and Citation Style 2 generate COinS metadata. If a template is used in a citation template field, then it may inject HTML into the metadata.
Compare the rendered HTML for {{cite book}} with |author= using no template and using {{smallcaps}}.
| Markup | Renders as | 
|---|---|
{{cite book |author=Sam Drucker |title=Title}}
 | 
Sam Drucker. Title.
 
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{{cite book |author={{smallcaps|Sam Drucker}} |title=Title}}
 | 
Sam Drucker. Title.
 
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The author metadata is in the rft.aulast field. In this case, it is percent-encoded and is rendered as <span class="smallcaps" style="font-variant:small-caps;">Sam Drucker</span>
Reference management software will interpret the entire span as the author name.
See also
|  The above documentation is transcluded from Template:COinS safe/doc. (edit | history)  Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages. Please add categories and interwikis to the /doc subpage. Subpages of this template.  | 
