Xpath Package for Golang, Supports HTML, XML, JSON Document Query

XPath  

XPath is Go package provides selecting nodes from XML, HTML or other documents using XPath expression.

Implementation

htmlquery - an XPath query package for HTML document

xmlquery - an XPath query package for XML document.

jsonquery - an XPath query package for JSON document

Supported Features

The basic XPath patterns.

The basic XPath patterns cover 90% of the cases that most stylesheets will need.

node : Selects all child elements with nodeName of node.

* : Selects all child elements.

@attr : Selects the attribute attr.

@* : Selects all attributes.

node() : Matches an org.w3c.dom.Node.

text() : Matches a org.w3c.dom.Text node.

comment() : Matches a comment.

. : Selects the current node.

.. : Selects the parent of current node.

/ : Selects the document node.

a[expr] : Select only those nodes matching a which also satisfy the expression expr.

a[n] : Selects the nth matching node matching a When a filter's expression is a number, XPath selects based on position.

a/b : For each node matching a, add the nodes matching b to the result.

a//b : For each node matching a, add the descendant nodes matching b to the result.

//b : Returns elements in the entire document matching b.

a|b : All nodes matching a or b, union operation(not boolean or).

(a, b, c) : Evaluates each of its operands and concatenates the resulting sequences, in order, into a single result sequence

(a/b) : Selects all matches nodes as grouping set.

Node Axes

child::* : The child axis selects children of the current node.

descendant::* : The descendant axis selects descendants of the current node. It is equivalent to '//'.

descendant-or-self::* : Selects descendants including the current node.

attribute::* : Selects attributes of the current element. It is equivalent to @*

following-sibling::* : Selects nodes after the current node.

preceding-sibling::* : Selects nodes before the current node.

following::* : Selects the first matching node following in document order, excluding descendants.

preceding::* : Selects the first matching node preceding in document order, excluding ancestors.

parent::* : Selects the parent if it matches. The '..' pattern from the core is equivalent to 'parent::node()'.

ancestor::* : Selects matching ancestors.

ancestor-or-self::* : Selects ancestors including the current node.

self::* : Selects the current node. '.' is equivalent to 'self::node()'.

Expressions

The gxpath supported three types: number, boolean, string.

path : Selects nodes based on the path.

a = b : Standard comparisons.

  • a = b True if a equals b.
  • a != b True if a is not equal to b.
  • a < b True if a is less than b.
  • a <= b True if a is less than or equal to b.
  • a > b True if a is greater than b.
  • a >= b True if a is greater than or equal to b.

a + b : Arithmetic expressions.

  • - a Unary minus
  • a + b Add
  • a - b Substract
  • a * b Multiply
  • a div b Divide
  • a mod b Floating point mod, like Java.

a or b : Boolean or operation.

a and b : Boolean and operation.

(expr) : Parenthesized expressions.

fun(arg1, ..., argn) : Function calls:

FunctionSupported
boolean()
ceiling()
choose()
concat()
contains()
count()
current()
document()
element-available()
ends-with()
false()
floor()
format-number()
function-available()
generate-id()
id()
key()
lang()
last()
local-name()
matches()
name()
namespace-uri()
normalize-space()
not()
number()
position()
replace()
reverse()
round()
starts-with()
string()
string-length()
substring()
substring-after()
substring-before()
sum()
system-property()
translate()
true()
unparsed-entity-url()

Author: Antchfx
Source Code: https://github.com/antchfx/xpath 
License: MIT license

#go #golang #html #xml 

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Buddha Community

Xpath Package for Golang, Supports HTML, XML, JSON Document Query

Xpath Package for Golang, Supports HTML, XML, JSON Document Query

XPath  

XPath is Go package provides selecting nodes from XML, HTML or other documents using XPath expression.

Implementation

htmlquery - an XPath query package for HTML document

xmlquery - an XPath query package for XML document.

jsonquery - an XPath query package for JSON document

Supported Features

The basic XPath patterns.

The basic XPath patterns cover 90% of the cases that most stylesheets will need.

node : Selects all child elements with nodeName of node.

* : Selects all child elements.

@attr : Selects the attribute attr.

@* : Selects all attributes.

node() : Matches an org.w3c.dom.Node.

text() : Matches a org.w3c.dom.Text node.

comment() : Matches a comment.

. : Selects the current node.

.. : Selects the parent of current node.

/ : Selects the document node.

a[expr] : Select only those nodes matching a which also satisfy the expression expr.

a[n] : Selects the nth matching node matching a When a filter's expression is a number, XPath selects based on position.

a/b : For each node matching a, add the nodes matching b to the result.

a//b : For each node matching a, add the descendant nodes matching b to the result.

//b : Returns elements in the entire document matching b.

a|b : All nodes matching a or b, union operation(not boolean or).

(a, b, c) : Evaluates each of its operands and concatenates the resulting sequences, in order, into a single result sequence

(a/b) : Selects all matches nodes as grouping set.

Node Axes

child::* : The child axis selects children of the current node.

descendant::* : The descendant axis selects descendants of the current node. It is equivalent to '//'.

descendant-or-self::* : Selects descendants including the current node.

attribute::* : Selects attributes of the current element. It is equivalent to @*

following-sibling::* : Selects nodes after the current node.

preceding-sibling::* : Selects nodes before the current node.

following::* : Selects the first matching node following in document order, excluding descendants.

preceding::* : Selects the first matching node preceding in document order, excluding ancestors.

parent::* : Selects the parent if it matches. The '..' pattern from the core is equivalent to 'parent::node()'.

ancestor::* : Selects matching ancestors.

ancestor-or-self::* : Selects ancestors including the current node.

self::* : Selects the current node. '.' is equivalent to 'self::node()'.

Expressions

The gxpath supported three types: number, boolean, string.

path : Selects nodes based on the path.

a = b : Standard comparisons.

  • a = b True if a equals b.
  • a != b True if a is not equal to b.
  • a < b True if a is less than b.
  • a <= b True if a is less than or equal to b.
  • a > b True if a is greater than b.
  • a >= b True if a is greater than or equal to b.

a + b : Arithmetic expressions.

  • - a Unary minus
  • a + b Add
  • a - b Substract
  • a * b Multiply
  • a div b Divide
  • a mod b Floating point mod, like Java.

a or b : Boolean or operation.

a and b : Boolean and operation.

(expr) : Parenthesized expressions.

fun(arg1, ..., argn) : Function calls:

FunctionSupported
boolean()
ceiling()
choose()
concat()
contains()
count()
current()
document()
element-available()
ends-with()
false()
floor()
format-number()
function-available()
generate-id()
id()
key()
lang()
last()
local-name()
matches()
name()
namespace-uri()
normalize-space()
not()
number()
position()
replace()
reverse()
round()
starts-with()
string()
string-length()
substring()
substring-after()
substring-before()
sum()
system-property()
translate()
true()
unparsed-entity-url()

Author: Antchfx
Source Code: https://github.com/antchfx/xpath 
License: MIT license

#go #golang #html #xml 

Brandon  Adams

Brandon Adams

1625637060

What is JSON? | JSON Objects and JSON Arrays | Working with JSONs Tutorial

In this video, we work with JSONs, which are a common data format for most web services (i.e. APIs). Thank you for watching and happy coding!

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Ava Watson

Ava Watson

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Know Everything About HTML With HTML Experts

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The document component of HTML is known as an HTML element. HTML element helps in displaying the web pages. An HTML document is a mixture of text nodes and HTML elements.

Basics of HTML are-

The simple fundamental components oh HTML is

  1. Head- the setup information for the program and web pages is carried in the head
  2. Body- the actual substance that is to be shown on the web page is carried in the body
  3. HTML- information starts and ends with and labels.
  4. Comments- come up in between

Html versions timeline

  1. HTML was created in 1990. Html is a program that is updated regularly. the timeline for the HTML versions is
  2. HTML 2- November, 1995
  3. HTML 3- January, 1997
  4. HTML 4- December, 1997; April, 1998; December, 1999; May, 2000
  5. HTML 5- October, 2014; November, 2016; December, 2017

HTML draft version timelines are

  1. October 1991
  2. June 1992
  3. November 1992
  4. June 1993
  5. November 1993
  6. November 1994
  7. April 1995
  8. January 2008
  9. HTML 5-
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    2012 candidate recommendation
    2014 proposed recommendation and recommendation

HTML helps in creating web pages. In web pages, there are texts, pictures, colouring schemes, tables, and a variety of other things. HTML allows all these on a web page.
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Ssekidde  Nat

Ssekidde Nat

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HTML Vs XML: Difference Between HTML and XML [2021]

HTML’s full form is Hypertext Markup Language, while XML is an Extensible Markup Language. The purpose of HTML is to display data and focus on how the data looks. Therefore, HTML describes a web page’s structure and displays information, whereas XML structures, stores, and transfers information and describes what the data is.

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In this article, HTML and XML shall be discussed in detail to understand the differences between them.

What is HTML?

Hypertext Markup Language (HTML) is a programming language that displays data and describes a web page’s structure. Hypertext facilitates browsing the web by referring to the hyperlinks an HTML page contains. The hyperlink enables one to go to any place on the internet by clicking it. There is no set order to do so.

Markup language points out to the way tags are used in defining the page layout and the elements within the page. It consists of various HTML elements comprising tags and their content. HTML language enables the creation of links of documents, is static, and can ignore small errors. In HTML, closing tags are not necessary. It can be defined as a markup language that makes the text more dynamic and interactive.

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Wasswa  Meagan

Wasswa Meagan

1619678404

HTML Vs XML: Difference Between HTML and XML [2021]

HTML’s full form is Hypertext Markup Language, while XML is an Extensible Markup Language. The purpose of HTML is to display data and focus on how the data looks. Therefore, HTML describes a web page’s structure and displays information, whereas XML structures, stores, and transfers information and describes what the data is.

In this article, HTML and XML shall be discussed in detail to understand the differences between them.

What is HTML?

Hypertext Markup Language (HTML) is a programming language that displays data and describes a web page’s structure. Hypertext facilitates browsing the web by referring to the hyperlinks an HTML page contains. The hyperlink enables one to go to any place on the internet by clicking it. There is no set order to do so.

Markup language points out to the way tags are used in defining the page layout and the elements within the page. It consists of various HTML elements comprising tags and their content. HTML language enables the creation of links of documents, is static, and can ignore small errors. In HTML, closing tags are not necessary. It can be defined as a markup language that makes the text more dynamic and interactive.

#software development #html #html vs xml #xml