# Wiki Links
With the flag `MD_FLAG_WIKILINKS`, MD4C recognizes wiki links.
The simple wiki-link is a wiki-link destination enclosed in `[[` followed with
`]]`.
```````````````````````````````` example
[[foo]]
.
foo
````````````````````````````````
However wiki-link may contain an explicit label, delimited from the destination
with `|`.
```````````````````````````````` example
[[foo|bar]]
.
bar
````````````````````````````````
A wiki-link destination cannot be empty.
```````````````````````````````` example
[[]]
.
[[]]
````````````````````````````````
```````````````````````````````` example
[[|foo]]
.
[[|foo]]
````````````````````````````````
The wiki-link destination cannot contain a new line.
```````````````````````````````` example
[[foo
bar]]
.
[[foo
bar]]
````````````````````````````````
```````````````````````````````` example
[[foo
bar|baz]]
.
[[foo
bar|baz]]
````````````````````````````````
The wiki-link destination is rendered verbatim; inline markup in it is not
recognized.
```````````````````````````````` example
[[*foo*]]
.
*foo*
````````````````````````````````
```````````````````````````````` example
[[foo|![bar](bar.jpg)]]
.
![bar](bar.jpg)
````````````````````````````````
With multiple `|` delimiters, only the first one is recognized and the other
ones are part of the label.
```````````````````````````````` example
[[foo|bar|baz]]
.
bar|baz
````````````````````````````````
However the delimiter `|` can be escaped with `/`.
```````````````````````````````` example
[[foo\|bar|baz]]
.
baz
````````````````````````````````
The label can contain inline elements.
```````````````````````````````` example
[[foo|*bar*]]
.
bar
````````````````````````````````
Empty explicit label is the same as using the implicit label; i.e. the verbatim
destination string is used as the label.
```````````````````````````````` example
[[foo|]]
.
foo
````````````````````````````````
The label can span multiple lines.
```````````````````````````````` example
[[foo|foo
bar
baz]]
.
foo
bar
baz
````````````````````````````````
Wiki-links have higher priority than links.
```````````````````````````````` example
[[foo]](foo.jpg)
.
foo(foo.jpg)
````````````````````````````````
```````````````````````````````` example
[foo]: /url
[[foo]]
.
foo
````````````````````````````````
Wiki links can be inlined in tables.
```````````````````````````````` example
| A | B |
|------------------|-----|
| [[foo|*bar*]] | baz |
.
````````````````````````````````
Wiki-links are not prioritized over images.
```````````````````````````````` example
![[foo]](foo.jpg)
.
![[foo]](foo.jpg)
````````````````````````````````
Something that may look like a wiki-link at first, but turns out not to be,
is recognized as a normal link.
```````````````````````````````` example
[[foo]
[foo]: /url
.
[foo
````````````````````````````````
Escaping the opening `[` escapes only that one character, not the whole `[[`
opener:
```````````````````````````````` example
\[[foo]]
[foo]: /url
.
[foo]
````````````````````````````````
Like with other inline links, the innermost wiki-link is preferred.
```````````````````````````````` example
[[foo[[bar]]]]
.
[[foobar]]
````````````````````````````````
There is limit of 100 characters for the wiki-link destination.
```````````````````````````````` example
[[12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901]]
[[12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901|foo]]
.
[[12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901]]
[[12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901|foo]]
````````````````````````````````
100 characters inside a wiki link target works.
```````````````````````````````` example
[[1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890]]
[[1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890|foo]]
.
1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
foo
````````````````````````````````
The limit on link content does not include any characters belonging to a block
quote, if the label spans multiple lines contained in a block quote.
```````````````````````````````` example
> [[12345678901234567890123456789012345678901234567890|1234567890
> 1234567890
> 1234567890
> 1234567890
> 123456789]]
.
1234567890
1234567890
1234567890
1234567890
123456789
````````````````````````````````