» XPath (XML)
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

XPath (XML)

Help Returns a Spread of matches to XPath Queries
Author vvvv group

Here you are supposed to see an image (rendered with SVG) describing the pins of this node. However, this does not work with Internet Explorer. You may want to consider using another browser, like FireFox, Chrome, Safari or Opera that do support SVG.

Credits
Warnings
Bugs

related discussions

start a forum thread about this node

about XPath (XML)

Returns a Spread of matches from an XPath-Query.
XPath is a W3C Recommendation and describes a way how to navigate through XML Documents.
We can use XPath to select values of elements from a XML File. Every XPath Expression must start with "/". An XPath expression works like navigating a file system; where a forward slash (/) selects subdirectories.
Inside of [ ] Brackets you can specify you your Query. Then you keep on defining the Path with "/". The "@" means that you select an attribute.

There are a lot of functions and operators you can use. We cant give a complete instruction to XPath. But try the Microsoft Reference Online.
A good site to learn everything about the X-Stuff ishttp://www.w3schools.com
A good reference of XPath Syntax and Fuctions is http://msdn.microsoft.com/en-us/library/ms256115.aspx

Examples

if you ever had a look at a .v4p file using a texteditor you will see that those are also pure XML.
so the following examples will be based on vvvv's own files.

parsing a .v4p file with this query

/PATCH/NODE/PIN[@pinname='Descriptive Name']/@values

will output a spread containing all Descriptive Names used in the patch.

/PATCH/NODE[@id='7']/@nodename

will output the nodename of the node with the id ="7"

so this way you can navigate in XML with paths similar to the folderstructures of your harddisk.

you can do more advanced queries like:

/PATCH/NODE[(@nodename='IOBox (Value Advanced)')and(not(PIN[contains(@pinname,'Descriptive Name')]))]/@id

which will output a spread containg all id's of IOBox Values which do NOT have a Descriptive Name.

hints

See also XSLT (XML)

anonymous user login

Shoutbox

~1d ago

joreg: Know someone who should learn #vvvv? Send them to one of our intro workshops in #Berlin https://nodeforum.org/announcements/2020-series-of-2h-introduction-workshops-to-vvvv-gamma/ #creativecoding

~1d ago

udo2013: @sunep:had an idea how to restore midi-data by one lick and bring the sliders in original position.patch in forum."restore midi.."

~7d ago

sunep: @udo2013 make a forum post about and I can share my subpatch

~7d ago

sunep: @udo2013 I have myself dealt with that problem by using LTP (Value) in pickup mode

~11d ago

~11d ago

~14d ago

joreg: @soundreactor: yes

~14d ago

soundreactor: is 50beta.. supposed to be working in windows 7 ?