===================================================================
RCS file: /cvs/mandoc/eqn.7,v
retrieving revision 1.10
retrieving revision 1.16
diff -u -p -r1.10 -r1.16
--- mandoc/eqn.7 2011/07/21 13:37:04 1.10
+++ mandoc/eqn.7 2011/07/22 14:26:32 1.16
@@ -1,4 +1,4 @@
-.\" $Id: eqn.7,v 1.10 2011/07/21 13:37:04 kristaps Exp $
+.\" $Id: eqn.7,v 1.16 2011/07/22 14:26:32 kristaps Exp $
.\"
.\" Copyright (c) 2011 Kristaps Dzonsons
.\"
@@ -14,7 +14,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: July 21 2011 $
+.Dd $Mdocdate: July 22 2011 $
.Dt EQN 7
.Os
.Sh NAME
@@ -59,28 +59,29 @@ these are not the same as
macros, and may only be invoked as
.Sq \&.EQ .
.Pp
-The equation grammar is as follows:
+The equation grammar is as follows, where quoted strings are
+case-sensitive literals in the input:
.Bd -literal -offset indent
eqn : box | eqn box
box : text
- | { eqn }
- | DEFINE text text
- | SET text text
- | UNDEF text
+ | "{" eqn "}"
+ | "define" text text
+ | "set" text text
+ | "undef" text
+ | box pos box
| box mark
+ | pile "{" list "}"
| font box
+ | "size" text box
+ | "left" text eqn ["right" text]
text : TEXT
-mark : DOT
- | DOTDOT
- | HAT
- | TILDE
- | VEC
- | DYAD
- | BAR
- | UNDER
-font : ROMAN
- | ITALIC
- | BOLD
+pile : "lpile" | "cpile" | "rpile"
+pos : "over" | "sup" | "sub" | "to" | "from"
+mark : "dot" | "dotdot" | "hat" | "tilde" | "vec"
+ | "dyad" | "bar" | "under"
+font : "roman" | "italic" | "bold"
+list : eqn
+ | list "above" eqn
.Ed
.Pp
Data in TEXT form is a non-empty sequence of non-space characters or a
@@ -89,6 +90,19 @@ Unless within a quoted string, white-space (and enclos
pairs) is thrown away.
Quoted strings are not scanned for replacement definitions.
.Pp
+The following TEXT terms are translated into a rendered glyph, if
+available: alpha, beta, chi, delta, epsilon, eta, gamma, iota, kappa,
+lambda, mu, nu, omega, omicron, phi, pi, psi, rho, sigma, tau, theta,
+upsilon, xi, zeta, DELTA, GAMMA, LAMBDA, OMEGA, PHI, PI, PSI, SIGMA,
+THETA, UPSILON, XI, inter (intersection), union (union), prod (product),
+int (integral), sum (summation), grad (gradient), del (vector
+differential), times (multiply), cdot (centre-dot), nothing (zero-width
+space), approx (approximately equals), prime (prime), half (one-half),
+partial (partial differential), inf (infinity), >> (much greater), <<
+(much less), \-> (left arrow), <\- (right arrow), += (plus-minus), !=
+(not equal), == (equivalence), <= (less-than-equal), and >=
+(more-than-equal).
+.Pp
The following control statements are available:
.Bl -tag -width Ds
.It Cm define
@@ -194,7 +208,7 @@ In mandoc, this is interpreted as a comment.
.%D 1978
.Re
.Sh HISTORY
-The eqn utility, a preprocessor for troff, was originally written by
+The eqn utility, a preprocessor for troff, was originally written by
Brian W. Kernighan and Lorinda L. Cherry in 1975.
The GNU reimplementation of eqn, part of the GNU troff package, was
released in 1989 by James Clark.