An inline-zettel block allows to specify some content with another syntax without creating a new zettel.
This is useful, for example, if you want to embed some [Markdown](00001008010500) content, because you are too lazy to translate Markdown into Zettelmarkup.
Another example is to specify HTML code to use it for some kind of web front-end framework.

Like all other [line-range blocks](00001007030000#line-range-blocks), an inline-zettel block begins with at least three identical characters, starting at the first position of a line.
For inline-zettel blocks, the at-sign character (“`@`”, U+0040) is used.

You can add some [attributes](00001007050000) to the beginning line of an inline-zettel block, following the initiating characters.
The inline-zettel block uses the attribute key “syntax” to specify the [syntax](00001008000000) of the inline-zettel.
Alternatively, you can use the generic attribute to specify the syntax value.
If no value is provided, “[text](00001008000000#text)” is assumed.

Any other character in this first line will be ignored.

Text following the beginning line will not be interpreted until a line starts with at least the same number of identical at-sign characters as those in the beginning line.
This allows entering at-sign characters in the text that should not be interpreted at this level.

Some examples:

    @@@markdown
    A link to [this](00001007031200) zettel.
    @@@

will be rendered as:

A link to [this](00001007031200) zettel.

If you have set [`insecure-html`](00001004010000#insecure-html) to the value “zettelmarkup”, the following markup is not ignored:

    @@@html
    <h1>H1 Heading</h1>
    Alea iacta est
    @@@

will render a section heading of level 1, which is not allowed within Zettelmarkup:



Please note: some HTML code will not be fully rendered due to possible security implications.
This includes HTML lines that contain a `<script>` tag or an `<iframe>` tag.

Of course, you do not need to switch the syntax and you are allowed to nest inline-zettel blocks:

    @@@@zmk
    1st level inline
    @@@zmk
    2nd level inline
    Transclusion of zettel to enable authentication:
    {{{00001010040100}}}
    @@@
    @@@@

will result in the following HTML output:

1st level inline2nd level inlineTransclusion of zettel to enable authentication:To enable authentication, you must create a zettel that stores [authentication data](00001010040200) for the owner.
Then you must reference this zettel within the [startup configuration](00001004010000#owner) under the key `owner`.
Once the startup configuration contains a valid [zettel identifier](00001006050000) under that key, authentication is enabled.Please note that you must also set key `secret` of the [startup configuration](00001004010000#secret) to a random string (minimum length: 16 bytes) to secure the data exchanged with a client system.