在svg文件中添加版权声明的语义正确方法? [英] Semantically correct way to add a copyright notice into a svg file?

问题描述

我想在我的svg文件中添加版权声明，并且该声明应仅为隐藏"文本，而不能带有水印. 这并不是真正的保护，因为如果您使用文本编辑器打开svg文件，则可以编辑所有内容并删除版权.但是我认为这将是一种简单而又很好的显示方式，显示谁制作了该文件，并且如果有一些隐藏的信息，并且如果您正在寻找它，则可以很容易地找到未经许可的图形.

我的主要问题是:应如何将版权文本放入文件中?

• <title>元素用于辅助功能，某些用户代理将title元素显示为工具提示.
• <desc>元素通常可以提高可访问性，您应该描述用户将会看到的内容.
• 丑陋的方式:使用嵌入式CSS将其隐藏的文本元素.甚至不要考虑这一点！ :)
• <!--Copyright info here-->可能也是一个简单的解决方案.
• <metadata>:这是最好的方法，但是我没有找到详细的定义以及哪些子元素可以存在于其中.另外 https://developer.mozilla.org/en-US/DOM/SVGMetadataElement给出404. 在 https://www.w3.org/TR/SVG/struct.html #MetadataElement 我们可以找到更多详细信息.但是，RDF真的有必要吗?

我认为<metadata>元素是正确的位置，但是应该使用哪些子元素，而只是RDF是可行的方式?

解决方案

我认为 metadata元素是此处的正确选择.它必须包含XML，但没有必须是RDF序列化(例如， <metadata> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:schema="http://schema.org/"> <rdf:Description rdf:about="http://example.com/my-svg-file.svg"> <schema:license rdf:resource="https://creativecommons.org/licenses/by-sa/4.0/"/> </rdf:Description> </rdf:RDF> </metadata>

about属性将IRI作为值；对于独立的SVG文档，您可以提供一个空值(=文档的基本IRI).

在此示例中，我使用Schema.org中的 license属性:

适用于此内容的许可文档，通常由URL指示.

(词汇表Schema.org得到了几个大型搜索引擎的支持.)

I want to add a copyright notice in my svg files and it should be only "hidden" text and no watermark. This is no real protection, because if you open a svg file with a text editor you can edit everything and delete the copyright. But I think this would be a simple and great way to show, who has made the file and a possible chance to find unlicensed graphics if there is some hidden information and if you are looking for it you can easily find it.

My main question is: how should the copyright text be put into the file?

• <title> element is for accessibility purposes, some user agents display the title element as a tooltip.
• <desc> element generally improves accessibility and you should describe what a user would see.
• ugly way: a text element with inline CSS to hide it. Don't even think about this! :)
• <!--Copyright info here--> could be also a simple solution.
• <metadata>: this would the best way but I did not find a detailed definition and which child elements could live inside. Also https://developer.mozilla.org/en-US/DOM/SVGMetadataElement gives a 404. Under https://www.w3.org/TR/SVG/struct.html#MetadataElement we can find more details. But is RDF really necessary?

I think a <metadata> element is the right place, but which child elements should be used and is just RDF the way to go?

解决方案

I think the metadata element is the correct choice here. It has to contain XML, but it doesn’t have to be a RDF serialization (e.g., RDF/XML).

But I think it makes sense to use RDF here, because that’s exactly RDF’s job (providing metadata about resources, like SVG documents), and there is probably no other XML-based metadata language that has greater reach / better support.

A simple RDF statement (in RDF/XML) could look like this:

<metadata>
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:schema="http://schema.org/">
    <rdf:Description rdf:about="http://example.com/my-svg-file.svg">
      <schema:license rdf:resource="https://creativecommons.org/licenses/by-sa/4.0/"/>
    </rdf:Description>
  </rdf:RDF>
</metadata>

The about attribute takes an IRI as value; for a stand-alone SVG document, you could provide an empty value (= the base IRI of the document).

In this example I use the license property from Schema.org:

A license document that applies to this content, typically indicated by URL.

(The vocabulary Schema.org is supported by several big search engines.)

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