const char *zCmd = P("cmd");

  if( zCmd==0 ) zCmd = P("name");
  style_header("Command-line Help");
  if( zCmd ){
    int rc, idx;
    char *z, *s, *d;

    style_submenu_element("Command-List", "Command-List", "%s/help", g.zTop);
    if( *zCmd=='/' ){
      /* Some of the webpages require query parameters in order to work.
      ** @ <h1>The "<a href='%R%s(zCmd)'>%s(zCmd)</a>" page:</h1> */
      @ <h1>The "%s(zCmd)" page:</h1>
    }else{
      @ <h1>The "%s(zCmd)" command:</h1>
    }
    rc = name_search(zCmd, aCommand, count(aCommand), 0, &idx);
    if( rc==1 ){
      @ unknown command: %s(zCmd)
    }else if( rc==2 ){
      @ ambiguous command prefix: %s(zCmd)
    }else{
      z = (char*)aCmdHelp[idx].zText;

**
** Query parameters:
**
**    a=TIMEORTAG    after this event
**    b=TIMEORTAG    before this event
**    c=TIMEORTAG    "circa" this event
**    m=TIMEORTAG    mark this event
**    n=COUNT        suggested number of events in output
**    p=CHECKIN      parents and ancestors of CHECKIN
**    d=CHECKIN      descendants of CHECIN
**    dp=CHECKIN     The same as d=CHECKIN&p=CHECKIN
**    t=TAG          show only check-ins with the given TAG
**    r=TAG          show check-ins related to TAG
**    u=USER         only show items associated with USER
**    y=TYPE         'ci', 'w', 't', 'e', or (default) 'all'

**    ng             No Graph.
**    nd             Do not highlight the focus check-in
**    v              Show details of files changed
**    f=CHECKIN      Show family (immediate parents and children) of CHECKIN
**    from=CHECKIN   Path from...
**    to=CHECKIN       ... to this
**    shortest         ... show only the shortest path
**    uf=FILE_SHA1   Show only check-ins that contain the given file version
**    brbg           Background color from branch name
**    ubg            Background color from user
**    namechng       Show only check-ins that have filename changes
**    forks          Show only forks and their children
**    ym=YYYY-MM     Show only events for the given year/month.
**    yw=YYYY-WW     Show only events for the given week of the given year
**    ymd=YYYY-MM-DD Show only events on the given day
**    datefmt=N      Override the date format
**    bisect         Show the check-ins that are in the current bisect    
**
** p= and d= can appear individually or together.  If either p= or d=
** appear, then u=, y=, a=, and b= are ignored.
**
** If both a= and b= appear then both upper and lower bounds are honored.



*/
void page_timeline(void){
  Stmt q;                            /* Query used to generate the timeline */
  Blob sql;                          /* text of SQL used to generate timeline */
  Blob desc;                         /* Description of the timeline */
  int nEntry;                        /* Max number of entries on timeline */
  int p_rid = name_to_typed_rid(P("p"),"ci");  /* artifact p and its parents */