XHelp:parse error

A parse error is an error in parsing, that is an Xtech processor failure to properly analyse and interpret a value or code. Such errors usually only affect low-level files and do not interfere with the internal system but may nonetheless render some files inoperable, corrupt, or unreadable if the parse error is not repaired.
==Types==
===Error value.invalid===
This error occurs when the Xtakh attempts to interpret code and encounters an incorrect value and thus cannot perform operations specified by the code.  
====Examples====
=====A SIMUL page=====
Jaq wants to make an SIMUL webpage where all the text is green, so he types the following code:
 text.color: green
 --all
However, when he decides to preview his webpage, his editor program returns the following error message 
ERROR 
value.invalid at line 2, specifier 1.
all is not recognized as an attribute or specifier. for optimal functionality, please correct it. 
What's wrong with his code? He specified that he wanted all the text to be green. But, in SIMUL, the correct specifier is standardapply. Why standardapply? Standardapply tells an XtaerNet browser to apply a specific standard, that is, a rule that all objects of a webpage belonging to a specified class must follow unless an exception is made.