--- loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2008/03/20 16:59:13	1.13
+++ loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2011/05/21 14:08:10	1.20
@@ -65,10 +65,11 @@ Option 4 - @all = \&languages($\backslas
 \&roundto(\$x,\$n)  & Rounds a real number to n decimal points. \$x and \$n can be pure numbers \\
 \hline
  
-\&cas(\$s,\$e)&Evaluates the expression \$e inside the symbolic algebra system \$s. Currently, only the Maxima symbolic math system is implemented. Example: \&cas('maxima','6*7')\\ 
+\&cas(\$s,\$e,\$l)&Evaluates the expression \$e inside the symbolic algebra system \$s. Currently, only the Maxima symbolic math system is implemented. 
+\$l is an optional comma-separated list of libraries. Example: \&cas('maxima','6*7')\\ 
 \hline 
 
-\&implicit_multiplication(\$f)&Adds mathematical multiplication operators to the formula expression \$f where only implicit multiplication is used. Example: \&implicit_multiplication('2(b+3c)') returns 2*(b+3*c) \\
+\&implicit\_multiplication(\$f)&Adds mathematical multiplication operators to the formula expression \$f where only implicit multiplication is used. Example: \&implicit\_multiplication('2(b+3c)') returns 2*(b+3*c) \\
 \hline
 
 \&web(``a'',''b'',''c'') or \&web(\$a,\$b,\$c)  & Returns either a, b or c depending on the output medium. a is for plain ASCII, b for tex output and c for html output \\
@@ -127,15 +128,26 @@ Option 1 - \&map(\$seed,[$\backslash$\$w
 \&to\_string(\$x), \&to\_string(\$x,\$y)  & If x is an integer, returns a string. If x is real than the output is a string with format given by y. For example, if x = 12.3456, \&to\_string(x,''.3F'') = 12.345 and \&to\_string(x,''.3E'') = 1.234E+01. \\
 \hline
  
-\&class(), \&sec()  & Returns null string, class descriptive name, section number, set number and null string. \\
+\&class(), \&sec(), \&classid()  & Returns null string, class descriptive name, section number, class id, set number and null string. \\
 \hline
  
-\&name(), \&student\_number(), \&firstname(), \&lastname()  & Return the full name in the following format: lastname, firstname initial. Student\_number returns the student 9-alphanumeric string. The functions firstname and lastname return just that part of the name. If undefined, the functions return null. \\
+\&name(), \&student\_number(), \&firstname(), \&middlename(), \&lastname()  & Return the full name in the following format: lastname, firstname initial. Student\_number returns the student 9-alphanumeric string. The functions firstname, middlename, and lastname return just that part of the name. If undefined, the functions return null. \\
 \hline
-\&check\_status(\$partid) &Returns a number identifing the current status of a part. True values mean that a part is ``done'' (either unanswerable because of tries exhaustion, or correct) or a false value if a part can still be attempted. If \$part is unspecfied, it will check either the current $<$part$>$'s status or if outside of a $<$part$>$, check the status of previous $<$part$>$. The full set of return codes are: 'undef' means it is unattempted, 0 means it is attmpted and wrong but still has tries, 1 means it is marked correct, 2 means they have exceed maximum number of tries, 3 means it after the answer date\\
+\&check\_status(\$partid) &Returns a number identifying the current status of a part. True values mean that a part is ``done'' (either unanswerable because of tries exhaustion, or correct) or a false value if a part can still be attempted. If \$part is unspecified, it will check either the current $<$part$>$'s status or if outside of a $<$part$>$, check the status of previous $<$part$>$. The full set of return codes are: 'undef' means it is unattempted, 0 means it is attempted and wrong but still has tries, 1 means it is marked correct, 2 means they have exceed maximum number of tries, 3 means it after the answer date.\\
 \hline
-\&open\_date(), \&due\_date(), \&answer\_date()  & Problem open date, due date and answer date. The time is also included in 24-hr format. \\
+\&open\_date(\$partid), \&due\_date(\$partid), \&answer\_date(\$partid)  & Problem open date, due date and answer date in local human-readable format.  Part 0 is chosen if \$partid is omitted.\\
 \hline
+\&open\_date\_epoch(\$partid), \&due\_date\_epoch((\$partid), \&answer\_date\_epoch((\$partid)  & Problem open date, due date and answer date in seconds after the 
+epoch (UTC), which can be used in calculations.\\
+\hline
+
+\&submission(\$partid,\$responseid,\$version) & Returns what the student submitted for response \$responseid in part \$partid. You can get these IDs from the XML-code of the problem. \$version is optional and returns the \$version-th submission of the student that was graded.\\
+\hline
+
+\&currentpart() & 
+Returns the ID of the current part.\\
+\hline
+
  
 Not implemented  & Get and set the random seed. \\
 \hline