Sites

Sites

"site" = ~sitename
       = ~sitename[,~sitename]

Sites consist of 2-8 characters from the set "A-Z", "0-9" and "_". The first character must be a tilde (~) which is a required punctuation mark.

The wildcard characters "*" (matches any number of characters) and "?" matches any single character.

Site                    Description

~*                      all currently defined sites
~site1                  the site named "site1"
~site1,~site2           the sites named "site1" and "site2"
~act*                   all sites having a sitename prefix "act"

Boolean operations may be performed on existing sites to create new sites or just returned a selection list of atoms. The boolean operators AND, .OR., .NOT. and .XOR. are currently supported.

Site                    Description

~s1.and.~s2             intersection of sites "s1" and "s2"
~s1.or.~s2              union of sites "s1" and "s2"
~s1.not.~s2             those atoms in site "s1" not in site "s2"
~s1.xor.~s2             those atoms in sites "s1" and "s2" but not both 

In addition, triple boolean operations may be performed by grouping the first two in curly brackets. The boolean operation with {} is always evaluated first.

{~s1 .boolean. ~s2} .boolean. ~s3

Finally, sites may be used in conjunction with the /WITHIN filter to select atoms within a certain distance of a given site.

term/within=(distance,~sitename)

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