The Vienna Atomic Line Data Base (VALD-2) is an updated version of the original VALD database, which has been significantly improved with new and more accurate data for various atomic species. The database now includes data for neutral and ionized species such as Si, P, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Ru, Xe, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Re, Pt, Au, Hg, and Pb. The new data are critically evaluated and include experimental measurements and theoretical calculations, which are essential for computing line opacities in stellar atmospheres and for high-precision spectral synthesis. The database now includes a new referencing system that allows for proper acknowledgment of atomic data contributors and encourages collaboration. The software has been modified to allow remote users to specify individual extraction parameters and to have direct control over the quality ranking of line data. A World Wide Web interface is described which provides easy access to all new features. The database now includes a compilation of all publications used in each type of reply, which simplifies proper crediting of all authors of atomic data. The future roadmap of VALD developments includes the incorporation of molecular transitions and integration with external databases. The structure and new format of VALD line data have been described, including the new species identifier and the new referencing system. The software improvements include new extraction options, more efficient data storage, and the ability to handle large data sets. Mirror sites have been established to distribute the workload and reduce response time. The user interface has been improved to allow for better control of data extraction and to provide more detailed information on the accuracy of oscillator strengths. The new atomic line data and their evaluation have been discussed, including the inclusion of new data for light elements such as C, N, and O, and for iron group elements such as Scandium, Titanium, Manganese, Vanadium, Chromium, Iron, Cobalt, Nickel, and Copper. The new data have been compared with existing data and have been found to be more accurate. The database now includes data for about 23,000 lines from 58 different ions, and the new data have been tested and compared with existing data. The new data have been found to be more accurate and have been included in the VALD-2 database. The database now includes data for about 2962 FeI lines and 522 FeII lines, with a relative error in log gf of not more than 10% for half of the lines. The database now includes data for about 89 CoII lines and 151 NiII lines with accurate transition probabilities. The database now includes data for about 493 ZrIII lines and 39 YIII lines. The database nowThe Vienna Atomic Line Data Base (VALD-2) is an updated version of the original VALD database, which has been significantly improved with new and more accurate data for various atomic species. The database now includes data for neutral and ionized species such as Si, P, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Ru, Xe, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Re, Pt, Au, Hg, and Pb. The new data are critically evaluated and include experimental measurements and theoretical calculations, which are essential for computing line opacities in stellar atmospheres and for high-precision spectral synthesis. The database now includes a new referencing system that allows for proper acknowledgment of atomic data contributors and encourages collaboration. The software has been modified to allow remote users to specify individual extraction parameters and to have direct control over the quality ranking of line data. A World Wide Web interface is described which provides easy access to all new features. The database now includes a compilation of all publications used in each type of reply, which simplifies proper crediting of all authors of atomic data. The future roadmap of VALD developments includes the incorporation of molecular transitions and integration with external databases. The structure and new format of VALD line data have been described, including the new species identifier and the new referencing system. The software improvements include new extraction options, more efficient data storage, and the ability to handle large data sets. Mirror sites have been established to distribute the workload and reduce response time. The user interface has been improved to allow for better control of data extraction and to provide more detailed information on the accuracy of oscillator strengths. The new atomic line data and their evaluation have been discussed, including the inclusion of new data for light elements such as C, N, and O, and for iron group elements such as Scandium, Titanium, Manganese, Vanadium, Chromium, Iron, Cobalt, Nickel, and Copper. The new data have been compared with existing data and have been found to be more accurate. The database now includes data for about 23,000 lines from 58 different ions, and the new data have been tested and compared with existing data. The new data have been found to be more accurate and have been included in the VALD-2 database. The database now includes data for about 2962 FeI lines and 522 FeII lines, with a relative error in log gf of not more than 10% for half of the lines. The database now includes data for about 89 CoII lines and 151 NiII lines with accurate transition probabilities. The database now includes data for about 493 ZrIII lines and 39 YIII lines. The database now