Xpath Functionality
-------------------
1.Locating Elements With unknow Element and Attributes
Syntax:
------
//*[@attributeName='value']

2.Locating Elements with know Element and Attributes
Syntax:
--------
//tagName[@attributeName='value']

3.Locating Elements with Known vissible Text (exact Match)
Syntax:
-------
//tagName[text()='exact value']

4.Locating Element when part of the visible text is known (partial text)
Syntax:
--------
//tagName[contains(text(),'partial text')]

5.Locating Elements With multiple Attributes
To locate an exact element, we can use multiple attribute for selection.
Syntax:
--------
//*[attribute1='value1'][attribute2='value2'][attribute3='value3']

6.Locating elements When starting visible text is know
Syntax:
-------
//tagName[starts-with(text(),'starting text')]

7.Locating Elements With Dynamic Attribute values
Syntacx:
-------
//tagName[contains(@attributeName,'part of the value')]





Locating elements relative to known element
===========================================
1.Locating a parent element
syntax:
------
The parent axes contains the parent of the context node.
//<knownXapth>/parent::elementName
Examples:
---------
//*[@id='email']/parent::div

2.Locating a child element
The child axes contains the children of the context node
Syntax:
-------
//<xpathofKnownElement>/child::<elemrntName>

Example:
--------
(//div[@class='_6lux']/child::input)[1]

3.Locating ancestors of a known element 
The ancestor axes contains the ancestors of the known element
Syntax:
------
//<xpathofknownElement>/ancestor::<elementName>
Examples:
---------
//div[@class='_6lux']/ancestor::div

4.Locating following elements
Keyword=following::
Syntax:
------
//<xpathofknownElement>/following::<elementName>

5.Locating preceding elements
keyword:preceding
Syntax:
------
//<xpathofknownElement>/preceding::<elementName>


6.Locating following sibling:
keyword = following-sibling::
syntax:
-------
//<xpathofknownelement>/following-sibling::<element name>
//*[@id='txtUsername']/following-sibling::span
7.Locating Preceding sibling
keyword =preceding-sibling
syntax:
//<xpathofknownelement>/preceding-sibling::<element name>
//span[contains(text(),'username')]/preceding-sibling::input