Question: hi how to use Get Element Attribute in Robot framework? in instruction I have 
Return value of element attribute.

attribute\_locator consists of element locator followed by an @ sign and attribute name, for example `element_id@class`.

I have this `xpath=${check_radio_xpath}@class` is this right way?
where `${check_radio_xpath} = md-radio-11`

I get this error: 

```
${ischecked} = Selenium2Library . Get Element Attribute xpath=${check_radio_xpath}@class

Documentation:
Return value of element attribute.

TRACE   Arguments: [ 'xpath=md-radio-11@class' ]        
DEBUG   Finished Request    
FAIL    ValueError: Element 'xpath=md-radio-11' not found.

```

Answer: 
This snippet works for me :

```
Get Line Numbers And Verify
    ${line_number1}=    Get Element Attribute   //*[@id="file-keywords-txt-L1"] data-line-number
    Log To Console  ${line_number1}
    ${line_number2}=    Get Element Attribute   //*[@id="file-keywords-txt-L2"] data-line-number
    Log To Console  ${line_number2}
    Verify in order of ${line_number1} and ${line_number2} is true

```

What was important is that the spaces/tabs between the keywords are correct, otherwise it does not get recognised as a so called keyword.
Thanks a lot, i wanted to check meta noindex content in page source.

i used this.

```
${content}  Get Element Attribute   xpath=//meta[@name="robots"]@content
should be equal as strings  ${content}  noindex,follow

```