goxpath: An XPath 1.0 parser

[Chris Trenkamp]

https://github.com/ChrisTrenkamp/goxpath

I've created an XPath 1.0 parser.  The only thing missing is the id() function for complicated reasons.  It also comes with a command-line utility that works like xmlstarlet, except it only has XPath queries.

Looking for feedback.  Let me know if you find this useful.

[Henrik Johansson]

How does it compare to https://godoc.org/launchpad.net/xmlpath?

I have been using it with great satisfaction but it is not complete to my knowledge xpath feature wise.

 

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[Gustavo Niemeyer]

Please note that the xmlpath package actually lives at:

http://gopkg.in/xmlpath.v2

--

gustavo @ http://niemeyer.net

[Chris Trenkamp]

I've never used xmlpath, so I can't really compare them.

However, I can talk about some of the design goals:

• Provide a flexible-enough API so you can write your own functions in XPath expressions.
  
• Abstract the tree to an interface so that not only can XML documents be parsed, but other document types as well.  Since I started this project, I've been wanting to provide support for XML-tagged structs.
• Be XPath 1.0 compliant.

[sea...@arista.com]

I've been doing some work on goxpath to use it to evaluate xpath expressions used in YANG. One issue I just hit is the XSLT current() function is used in the YANG files, this fails to evaluate as current() isn't included in the implementation. Did you consider it at all ?

[Lutz Horn]

Hi,

* Are you talking about https://github.com/ChrisTrenkamp/goxpath?
* What is YANG?
* Whom do you address as "you"?

Regards

Lutz

[sea...@arista.com]

Yes referring to https://github.com/ChrisTrenkamp/goxpath

YANG is a data modelling language, that may use XML to represent the data stored in a model. Valid relationship between nodes can be expresses as XPATH expressions. These XPATH expression sometimes use current(), for example:

/acl/acl-sets/acl-set[name=current()/../../../../set-name][type=current()/../../../../type]/acl-entries/acl-entry/sequence-id

You would be Chris Trenkamp.

[Lutz Horn]

Hi,

Am 14.06.2017 15:57 schrieb seamus via golang-nuts:
> Yes referring to https://github.com/ChrisTrenkamp/goxpath

> ...

> You would be Chris Trenkamp.

Then you will probably get better answers if you open an issue on this
GitHub project. The people here on go-nuts did not write this library
nor can they tell you what the current status of it is.

Regards

Lutz

[Jim Robinson]

Since he was the initial author of this thread you're replying to, it does seem reasonable enough to also raise the question here. :)