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<!--
* Copyright (C) 2013 D Haley
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
-->
<!-- This is a DTD for the natural abundance data file -->
<!--root node -->
<!ELEMENT atomic-mass-table (entry*) >
<!-- natural abundance data node, used to encapsulate mass/fraction data-->
<!ELEMENT entry (natural-abundance*) >
<!ELEMENT natural-abundance (mass,isotope+) >
<!ELEMENT isotope (mass,abundance) >
<!ELEMENT mass EMPTY>
<!ELEMENT abundance EMPTY>
<!-- Mass units must be in unified atomic mass units, with value "u"
this option exists to hypothetically add support to other systems
at some later time. -->
<!ATTLIST atomic-mass-table mass-units CDATA #REQUIRED>
<!-- Abundance units must be in "Mole Fraction" -->
<!ATTLIST atomic-mass-table abundance-units CDATA #REQUIRED>
<!-- Symbol for element, eg hydrogen would be "H", helium "He" and so on-->
<!ATTLIST entry symbol CDATA #REQUIRED>
<!-- Atomic number for element, integer -->
<!ATTLIST entry atomic-number CDATA #REQUIRED>
<!-- Mass value for element/isotope, in units that are specified in atomic-mass-table:
* From element, computed by A_r = \frac{\sigma m_i x_i}{\sigma x_i},
where xi are the isotope natural abundances, and m_i are
the isotopes
* When used in an isotope , for the specific isotope
-->
<!ATTLIST mass value CDATA #REQUIRED>
<!-- Mass error for element - the exact statistical meaning of this value is not specified here -->
<!ATTLIST mass error CDATA #REQUIRED>
<!-- Typical natural abundance value (0,1], for the reported isotope -->
<!ATTLIST abundance value CDATA #REQUIRED>
<!-- Abundance error - should be taken with a pinch of salt, as abundance values can change by material origin-->
<!ATTLIST abundance error CDATA #REQUIRED>
<!ATTLIST isotope mass-number CDATA #REQUIRED>
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